Repository: r-raymond/nixos-mailserver
Branch: master
Commit: 637c3707c5cf
Files: 30
Total size: 114.1 KB
Directory structure:
gitextract_d0n5qxfj/
├── .editorconfig
├── .gitignore
├── .travis.yml
├── ISSUE_TEMPLATE.md
├── LICENSE
├── README.md
├── default.nix
├── mail-server/
│ ├── borgbackup.nix
│ ├── clamav.nix
│ ├── common.nix
│ ├── dovecot-version.nix
│ ├── dovecot.nix
│ ├── environment.nix
│ ├── kresd.nix
│ ├── monit.nix
│ ├── networking.nix
│ ├── nginx.nix
│ ├── post-upgrade-check.nix
│ ├── postfix.nix
│ ├── rmilter.nix
│ ├── rsnapshot.nix
│ ├── services.nix
│ ├── systemd.nix
│ └── users.nix
├── nixops/
│ ├── single-server.nix
│ └── vbox.nix
├── tests/
│ ├── extern.nix
│ ├── intern.nix
│ └── minimal.nix
└── update.sh
================================================
FILE CONTENTS
================================================
================================================
FILE: .editorconfig
================================================
root = true
[*]
charset = utf-8
end_of_line = lf
indent_style = space
indent_size = 2
insert_final_newline = true
trim_trailing_whitespace = true
================================================
FILE: .gitignore
================================================
result
================================================
FILE: .travis.yml
================================================
language: nix
env:
- NIX_PATH="nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-18.03.tar.gz"
- NIX_PATH="nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz"
script:
- nix-build tests/intern.nix
- nix-build tests/extern.nix
================================================
FILE: ISSUE_TEMPLATE.md
================================================
(Use this template for bugs, feel free to delete it for other issues)
#### SNM Version: (e.g. v2.1.3)
#### Nixos Version: (e.g. 17.09 or unstable)
#### Relevant part of the config to reproduce:
#### What I expected to happen:
#### What happened:
#### Relevant journald log:
================================================
FILE: LICENSE
================================================
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possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
{one line to give the program's name and a brief idea of what it does.}
Copyright (C) {year} {name of author}
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
{project} Copyright (C) {year} {fullname}
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.
================================================
FILE: README.md
================================================
# ![Simple Nixos MailServer][logo]
**THIS REPO IS NOT UPDATED ANYMORE, IT HAS BEEN MOVED TO GITLAB. PLEASE DON'T OPEN
ANY MORE PR'S OR ISSUES ON GITHUB**
[Link to SNM on Gitlab](https://gitlab.com/simple-nixos-mailserver/nixos-mailserver)
## Stable Releases
* [SNM v2.1.4](https://github.com/r-raymond/nixos-mailserver/releases/v2.1.4)
[Latest Release (Candidate)](https://github.com/r-raymond/nixos-mailserver/releases/latest)
[Subscribe to SNM Announcement List](https://www.freelists.org/list/snm)
This is a very low volume list where new releases of SNM are announced, so you
can stay up to date with bug fixes and updates. All announcements are signed by
the gpg key with fingerprint
```
D9FE 4119 F082 6F15 93BD BD36 6162 DBA5 635E A16A
```
## Features
### v2.0
* [x] Continous Integration Testing
* [x] Multiple Domains
* Postfix MTA
- [x] smtp on port 25
- [x] submission port 587
- [x] lmtp with dovecot
* Dovecot
- [x] maildir folders
- [x] imap starttls on port 143
- [x] pop3 starttls on port 110
* Certificates
- [x] manual certificates
- [x] on the fly creation
- [x] Let's Encrypt
* Spam Filtering
- [x] via rspamd
* Virus Scanning
- [x] via clamav
* DKIM Signing
- [x] via opendkim
* User Management
- [x] declarative user management
- [x] declarative password management
* Sieves
- [x] A simple standard script that moves spam
- [x] Allow user defined sieve scripts
- [x] ManageSieve support
* User Aliases
- [x] Regular aliases
- [x] Catch all aliases
### In the future
* DKIM Signing
- [ ] Allow a per domain selector
### Changelog
See the [mailing list archive](https://www.freelists.org/archive/snm/)
### Quick Start
```nix
{ config, pkgs, ... }:
{
imports = [
(builtins.fetchTarball "https://github.com/r-raymond/nixos-mailserver/archive/v2.1.4.tar.gz")
];
mailserver = {
enable = true;
fqdn = "mail.example.com";
domains = [ "example.com" "example2.com" ];
loginAccounts = {
"user1@example.com" = {
hashedPassword = "$6$/z4n8AQl6K$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/";
aliases = [
"info@example.com"
"postmaster@example.com"
"postmaster@example2.com"
];
};
};
};
}
```
For a complete list of options, see `default.nix`.
## How to Set Up a 10/10 Mail Server Guide
Check out the [Complete Setup Guide](https://github.com/r-raymond/nixos-mailserver/wiki/A-Complete-Setup-Guide) in the project's wiki.
## How to Backup
Checkout the [Complete Backup Guide](https://github.com/r-raymond/nixos-mailserver/wiki/A-Complete-Backup-Guide). Backups are easy with `SNM`.
## Development
See the [How to Develop SNM](https://github.com/r-raymond/nixos-mailserver/wiki/How-to-Develop-SNM) wiki page.
## Contributors
See the [contributor tab](https://github.com/r-raymond/nixos-mailserver/graphs/contributors)
### Alternative Implementations
* [NixCloud Webservices](https://github.com/nixcloud/nixcloud-webservices)
### Credits
* send mail graphic by [tnp_dreamingmao](https://thenounproject.com/dreamingmao)
from [TheNounProject](https://thenounproject.com/) is licensed under
[CC BY 3.0](http://creativecommons.org/~/3.0/)
* Logo made with [Logomakr.com](https://logomakr.com)
[logo]: logo/logo.png
================================================
FILE: default.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.mailserver;
in
{
options.mailserver = {
enable = mkEnableOption "nixos-mailserver";
fqdn = mkOption {
type = types.str;
example = "mx.example.com";
description = "The fully qualified domain name of the mail server.";
};
domains = mkOption {
type = types.listOf types.str;
example = [ "example.com" ];
default = [];
description = "The domains that this mail server serves.";
};
loginAccounts = mkOption {
type = types.loaOf (types.submodule ({ name, ... }: {
options = {
name = mkOption {
type = types.str;
example = "user1@example.com";
description = "Username";
};
hashedPassword = mkOption {
type = types.str;
example = "$6$evQJs5CFQyPAW09S$Cn99Y8.QjZ2IBnSu4qf1vBxDRWkaIZWOtmu1Ddsm3.H3CFpeVc0JU4llIq8HQXgeatvYhh5O33eWG3TSpjzu6/";
description = ''
Hashed password. Use `mkpasswd` as follows
```
mkpasswd -m sha-512 "super secret password"
```
'';
};
aliases = mkOption {
type = with types; listOf types.str;
example = ["abuse@example.com" "postmaster@example.com"];
default = [];
description = ''
A list of aliases of this login account.
Note: Use list entries like "@example.com" to create a catchAll
that allows sending from all email addresses in these domain.
'';
};
catchAll = mkOption {
type = with types; listOf (enum cfg.domains);
example = ["example.com" "example2.com"];
default = [];
description = ''
For which domains should this account act as a catch all?
Note: Does not allow sending from all addresses of these domains.
'';
};
quota = mkOption {
type = with types; nullOr types.str;
default = null;
example = "2G";
description = ''
Per user quota rules. Accepted sizes are `xx k/M/G/T` with the
obvious meaning. Leave blank for the standard quota `100G`.
'';
};
sieveScript = mkOption {
type = with types; nullOr lines;
default = null;
example = ''
require ["fileinto", "mailbox"];
if address :is "from" "notifications@github.com" {
fileinto :create "GitHub";
stop;
}
# This must be the last rule, it will check if list-id is set, and
# file the message into the Lists folder for further investigation
elsif header :matches "list-id" "<?*>" {
fileinto :create "Lists";
stop;
}
'';
description = ''
Per-user sieve script.
'';
};
};
config.name = mkDefault name;
}));
example = {
user1 = {
hashedPassword = "$6$evQJs5CFQyPAW09S$Cn99Y8.QjZ2IBnSu4qf1vBxDRWkaIZWOtmu1Ddsm3.H3CFpeVc0JU4llIq8HQXgeatvYhh5O33eWG3TSpjzu6/";
};
user2 = {
hashedPassword = "$6$oE0ZNv2n7Vk9gOf$9xcZWCCLGdMflIfuA0vR1Q1Xblw6RZqPrP94mEit2/81/7AKj2bqUai5yPyWE.QYPyv6wLMHZvjw3Rlg7yTCD/";
};
};
description = ''
The login account of the domain. Every account is mapped to a unix user,
e.g. `user1@example.com`. To generate the passwords use `mkpasswd` as
follows
```
mkpasswd -m sha-512 "super secret password"
```
'';
default = {};
};
extraVirtualAliases = mkOption {
type = types.loaOf (mkOptionType {
name = "Login Account";
check = (ele:
let accounts = builtins.attrNames cfg.loginAccounts;
in if (builtins.isList ele)
then (builtins.all (x: builtins.elem x accounts) ele) && (builtins.length ele > 0)
else (builtins.elem ele accounts));
});
example = {
"info@example.com" = "user1@example.com";
"postmaster@example.com" = "user1@example.com";
"abuse@example.com" = "user1@example.com";
"multi@example.com" = [ "user1@example.com" "user2@example.com" ];
};
description = ''
Virtual Aliases. A virtual alias `"info@example.com" = "user1@example.com"` means that
all mail to `info@example.com` is forwarded to `user1@example.com`. Note
that it is expected that `postmaster@example.com` and `abuse@example.com` is
forwarded to some valid email address. (Alternatively you can create login
accounts for `postmaster` and (or) `abuse`). Furthermore, it also allows
the user `user1@example.com` to send emails as `info@example.com`.
It's also possible to create an alias for multiple accounts. In this
example all mails for `multi@example.com` will be forwarded to both
`user1@example.com` and `user2@example.com`.
'';
default = {};
};
rejectRecipients = mkOption {
type = types.listOf types.str;
example = [ "sales@example.com" "info@example.com" ];
description = ''
Reject emails addressed to these local addresses from unauthorized senders.
Use if a spammer has found email addresses in a catchall domain but you do
not want to disable the catchall.
'';
default = [];
};
vmailUID = mkOption {
type = types.int;
default = 5000;
description = ''
The unix UID of the virtual mail user. Be mindful that if this is
changed, you will need to manually adjust the permissions of
mailDirectory.
'';
};
vmailUserName = mkOption {
type = types.str;
default = "virtualMail";
description = ''
The user name and group name of the user that owns the directory where all
the mail is stored.
'';
};
vmailGroupName = mkOption {
type = types.str;
default = "virtualMail";
description = ''
The user name and group name of the user that owns the directory where all
the mail is stored.
'';
};
mailDirectory = mkOption {
type = types.path;
default = "/var/vmail";
description = ''
Where to store the mail.
'';
};
useFsLayout = mkOption {
type = types.bool;
default = false;
description = ''
Sets whether dovecot should organize mail in subdirectories:
- /var/vmail/example.com/user/.folder.subfolder/ (default layout)
- /var/vmail/example.com/user/folder/subfolder/ (FS layout)
See https://wiki2.dovecot.org/MailboxFormat/Maildir for details.
'';
};
hierarchySeparator = mkOption {
type = types.string;
default = ".";
description = ''
The hierarchy separator for mailboxes used by dovecot for the namespace 'inbox'.
Dovecot defaults to "." but recommends "/".
This affects how mailboxes appear to mail clients and sieve scripts.
For instance when using "." then in a sieve script "example.com" would refer to the mailbox "com" in the parent mailbox "example".
This does not determine the way your mails are stored on disk.
See https://wiki.dovecot.org/Namespaces for details.
'';
};
mailboxes = mkOption {
description = ''
The mailboxes for dovecot.
Depending on the mail client used it might be necessary to change some mailbox's name.
'';
default = [
{
name = "Trash";
auto = "no";
specialUse = "Trash";
}
{
name = "Junk";
auto = "subscribe";
specialUse = "Junk";
}
{
name = "Drafts";
auto = "subscribe";
specialUse = "Drafts";
}
{
name = "Sent";
auto = "subscribe";
specialUse = "Sent";
}
];
};
certificateScheme = mkOption {
type = types.enum [ 1 2 3 ];
default = 2;
description = ''
Certificate Files. There are three options for these.
1) You specify locations and manually copy certificates there.
2) You let the server create new (self signed) certificates on the fly.
3) You let the server create a certificate via `Let's Encrypt`. Note that
this implies that a stripped down webserver has to be started. This also
implies that the FQDN must be set as an `A` record to point to the IP of
the server. In particular port 80 on the server will be opened. For details
on how to set up the domain records, see the guide in the readme.
'';
};
certificateFile = mkOption {
type = types.path;
example = "/root/mail-server.crt";
description = ''
Scheme 1)
Location of the certificate
'';
};
keyFile = mkOption {
type = types.path;
example = "/root/mail-server.key";
description = ''
Scheme 1)
Location of the key file
'';
};
certificateDirectory = mkOption {
type = types.path;
default = "/var/certs";
description = ''
Sceme 2)
This is the folder where the certificate will be created. The name is
hardcoded to "cert-<domain>.pem" and "key-<domain>.pem" and the
certificate is valid for 10 years.
'';
};
enableImap = mkOption {
type = types.bool;
default = true;
description = ''
Whether to enable imap / pop3. Both variants are only supported in the
(sane) startTLS configuration. The ports are
110 - Pop3
143 - IMAP
587 - SMTP with login
'';
};
enableImapSsl = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable IMAPS, setting this option to true will open port 993
in the firewall.
'';
};
enablePop3 = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable POP3. Both variants are only supported in the (sane)
startTLS configuration. The ports are
110 - Pop3
143 - IMAP
587 - SMTP with login
'';
};
enablePop3Ssl = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable POP3S, setting this option to true will open port 995
in the firewall.
'';
};
enableManageSieve = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable ManageSieve, setting this option to true will open
port 4190 in the firewall.
The ManageSieve protocol allows users to manage their Sieve scripts on
a remote server with a supported client, including Thunderbird.
'';
};
virusScanning = mkOption {
type = types.bool;
default = false;
description = ''
Whether to activate virus scanning. Note that virus scanning is _very_
expensive memory wise.
'';
};
dkimSigning = mkOption {
type = types.bool;
default = true;
description = ''
Whether to activate dkim signing.
'';
};
dkimSelector = mkOption {
type = types.str;
default = "mail";
description = ''
'';
};
dkimKeyDirectory = mkOption {
type = types.path;
default = "/var/dkim";
description = ''
'';
};
dhParamBitLength = mkOption {
type = types.int;
default = 2048;
description =
''
Length of the Diffie Hillman prime used (in bits). It might be a good
idea to set this to 4096 for security purposed, but it will take a _very_
long time to create this prime on startup.
'';
};
debug = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable verbose logging for mailserver related services. This
intended be used for development purposes only, you probably don't want
to enable this unless you're hacking on nixos-mailserver.
'';
};
maxConnectionsPerUser = mkOption {
type = types.int;
default = 100;
description = ''
Maximum number of IMAP/POP3 connections allowed for a user from each IP address.
E.g. a value of 50 allows for 50 IMAP and 50 POP3 connections at the same
time for a single user.
'';
};
localDnsResolver = mkOption {
type = types.bool;
default = true;
description = ''
Runs a local DNS resolver (kresd) as recommended when running rspamd. This prevents your log file from filling up with rspamd_monitored_dns_mon entries.
'';
};
rewriteMessageId = mkOption {
type = types.bool;
default = false;
description = ''
Rewrites the Message-ID's hostname-part of outgoing emails to the FQDN.
Please be aware that this may cause problems with some mail clients
relying on the original Message-ID.
'';
};
monitoring = {
enable = mkEnableOption "monitoring via monit";
alertAddress = mkOption {
type = types.string;
description = ''
The email address to send alerts to.
'';
};
config = mkOption {
type = types.string;
default = ''
set daemon 120 with start delay 60
set mailserver
localhost
set httpd port 2812 and use address localhost
allow localhost
allow admin:obwjoawijerfoijsiwfj29jf2f2jd
check filesystem root with path /
if space usage > 80% then alert
if inode usage > 80% then alert
check system $HOST
if cpu usage > 95% for 10 cycles then alert
if memory usage > 75% for 5 cycles then alert
if swap usage > 20% for 10 cycles then alert
if loadavg (1min) > 90 for 15 cycles then alert
if loadavg (5min) > 80 for 10 cycles then alert
if loadavg (15min) > 70 for 8 cycles then alert
check process sshd with pidfile /var/run/sshd.pid
start program "${pkgs.systemd}/bin/systemctl start sshd"
stop program "${pkgs.systemd}/bin/systemctl stop sshd"
if failed port 22 protocol ssh for 2 cycles then restart
check process postfix with pidfile /var/lib/postfix/queue/pid/master.pid
start program = "${pkgs.systemd}/bin/systemctl start postfix"
stop program = "${pkgs.systemd}/bin/systemctl stop postfix"
if failed port 25 protocol smtp for 5 cycles then restart
check process dovecot with pidfile /var/run/dovecot2/master.pid
start program = "${pkgs.systemd}/bin/systemctl start dovecot2"
stop program = "${pkgs.systemd}/bin/systemctl stop dovecot2"
if failed host ${cfg.fqdn} port 993 type tcpssl sslauto protocol imap for 5 cycles then restart
check process rspamd with pidfile /var/run/rspamd.pid
start program = "${pkgs.systemd}/bin/systemctl start rspamd"
stop program = "${pkgs.systemd}/bin/systemctl stop rspamd"
'';
description = ''
The configuration used for monitoring via monit.
Use a mail address that you actively check and set it via 'set alert ...'.
'';
};
};
borgbackup = {
enable = mkEnableOption "backup via borgbackup";
repoLocation = mkOption {
type = types.string;
default = "/var/borgbackup";
description = ''
The location where borg saves the backups.
This can be a local path or a remote location such as user@host:/path/to/repo.
It is exported and thus available as an environment variable to cmdPreexec and cmdPostexec.
'';
};
startAt = mkOption {
type = types.string;
default = "hourly";
description = "When or how often the backup should run. Must be in the format described in systemd.time 7.";
};
user = mkOption {
type = types.string;
default = "virtualMail";
description = "The user borg and its launch script is run as.";
};
group = mkOption {
type = types.string;
default = "virtualMail";
description = "The group borg and its launch script is run as.";
};
compression = {
method = mkOption {
type = types.nullOr (types.enum ["none" "lz4" "zstd" "zlib" "lzma"]);
default = null;
description = "Leaving this unset allows borg to choose. The default for borg 1.1.4 is lz4.";
};
level = mkOption {
type = types.nullOr types.int;
default = null;
description = ''
Denotes the level of compression used by borg.
Most methods accept levels from 0 to 9 but zstd which accepts values from 1 to 22.
If null the decision is left up to borg.
'';
};
auto = mkOption {
type = types.bool;
default = false;
description = "Leaves it to borg to determine whether an individual file should be compressed.";
};
};
encryption = {
method = mkOption {
type = types.enum [
"none"
"authenticated"
"authenticated-blake2"
"repokey"
"keyfile"
"repokey-blake2"
"keyfile-blake2"
];
default = "none";
description = ''
The backup can be encrypted by choosing any other value than 'none'.
When using encryption the password / passphrase must be provided in passphraseFile.
'';
};
passphraseFile = mkOption {
type = types.nullOr types.path;
default = null;
};
};
name = mkOption {
type = types.string;
default = "{hostname}-{user}-{now}";
description = ''
The name of the individual backups as used by borg.
Certain placeholders will be replaced by borg.
'';
};
locations = mkOption {
type = types.listOf types.path;
default = [cfg.mailDirectory];
description = "The locations that are to be backed up by borg.";
};
extraArgumentsForInit = mkOption {
type = types.listOf types.string;
default = ["--critical"];
description = "Additional arguments to add to the borg init command line.";
};
extraArgumentsForCreate = mkOption {
type = types.listOf types.string;
default = [ ];
description = "Additional arguments to add to the borg create command line e.g. '--stats'.";
};
cmdPreexec = mkOption {
type = types.nullOr types.string;
default = null;
description = ''
The command to be executed before each backup operation.
This is called prior to borg init in the same script that runs borg init and create and cmdPostexec.
Example:
export BORG_RSH="ssh -i /path/to/private/key"
'';
};
cmdPostexec = mkOption {
type = types.nullOr types.string;
default = null;
description = ''
The command to be executed after each backup operation.
This is called after borg create completed successfully and in the same script that runs
cmdPreexec, borg init and create.
'';
};
};
rebootAfterKernelUpgrade = {
enable = mkOption {
type = types.bool;
default = false;
example = true;
description = ''
Whether to enable automatic reboot after kernel upgrades.
This is to be used in conjunction with system.autoUpgrade.enable = true"
'';
};
method = mkOption {
type = types.enum [ "reboot" "systemctl kexec" ];
default = "reboot";
description = ''
Whether to issue a full "reboot" or just a "systemctl kexec"-only reboot.
It is recommended to use the default value because the quicker kexec reboot has a number of problems.
Also if your server is running in a virtual machine the regular reboot will already be very quick.
'';
};
};
backup = {
enable = mkEnableOption "backup via rsnapshot";
snapshotRoot = mkOption {
type = types.path;
default = "/var/rsnapshot";
description = ''
The directory where rsnapshot stores the backup.
'';
};
cmdPreexec = mkOption {
type = types.nullOr types.string;
default = null;
description = ''
The command to be executed before each backup operation. This is wrapped in a shell script to be called by rsnapshot.
'';
};
cmdPostexec = mkOption {
type = types.nullOr types.string;
default = null;
description = "The command to be executed after each backup operation. This is wrapped in a shell script to be called by rsnapshot.";
};
retain = {
hourly = mkOption {
type = types.int;
default = 24;
description = "How many hourly snapshots are retained.";
};
daily = mkOption {
type = types.int;
default = 7;
description = "How many daily snapshots are retained.";
};
weekly = mkOption {
type = types.int;
default = 54;
description = "How many weekly snapshots are retained.";
};
};
cronIntervals = mkOption {
type = types.attrsOf types.string;
default = {
# minute, hour, day-in-month, month, weekday (0 = sunday)
hourly = " 0 * * * *"; # Every full hour
daily = "30 3 * * *"; # Every day at 3:30
weekly = " 0 5 * * 0"; # Every sunday at 5:00 AM
};
description = ''
Periodicity at which intervals should be run by cron.
Note that the intervals also have to exist in configuration
as retain options.
'';
};
};
};
imports = [
./mail-server/borgbackup.nix
./mail-server/rsnapshot.nix
./mail-server/clamav.nix
./mail-server/monit.nix
./mail-server/users.nix
./mail-server/environment.nix
./mail-server/networking.nix
./mail-server/systemd.nix
./mail-server/dovecot.nix
./mail-server/postfix.nix
./mail-server/rmilter.nix
./mail-server/nginx.nix
./mail-server/kresd.nix
./mail-server/post-upgrade-check.nix
];
}
================================================
FILE: mail-server/borgbackup.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver.borgbackup;
methodFragment = lib.optional (cfg.compression.method != null) cfg.compression.method;
autoFragment =
if cfg.compression.auto && cfg.compression.method == null
then throw "compression.method must be set when using auto."
else lib.optional cfg.compression.auto "auto";
levelFragment =
if cfg.compression.level != null && cfg.compression.method == null
then throw "compression.method must be set when using compression.level."
else lib.optional (cfg.compression.level != null) (toString cfg.compression.level);
compressionFragment = lib.concatStringsSep "," (lib.flatten [autoFragment methodFragment levelFragment]);
compression = lib.optionalString (compressionFragment != "") "--compression ${compressionFragment}";
encryptionFragment = cfg.encryption.method;
passphraseFile = lib.escapeShellArg cfg.encryption.passphraseFile;
passphraseFragment = lib.optionalString (cfg.encryption.method != "none")
(if cfg.encryption.passphraseFile != null then ''env BORG_PASSPHRASE="$(cat ${passphraseFile})"''
else throw "passphraseFile must be set when using encryption.");
locations = lib.escapeShellArgs cfg.locations;
name = lib.escapeShellArg cfg.name;
repoLocation = lib.escapeShellArg cfg.repoLocation;
extraInitArgs = lib.escapeShellArgs cfg.extraArgumentsForInit;
extraCreateArgs = lib.escapeShellArgs cfg.extraArgumentsForCreate;
cmdPreexec = lib.optionalString (cfg.cmdPreexec != null) cfg.cmdPreexec;
cmdPostexec = lib.optionalString (cfg.cmdPostexec != null) cfg.cmdPostexec;
borgScript = ''
export BORG_REPO=${repoLocation}
${cmdPreexec}
${passphraseFragment} ${pkgs.borgbackup}/bin/borg init ${extraInitArgs} --encryption ${encryptionFragment} || true
${passphraseFragment} ${pkgs.borgbackup}/bin/borg create ${extraCreateArgs} ${compression} ::${name} ${locations}
${cmdPostexec}
'';
in {
config = lib.mkIf (config.mailserver.enable && cfg.enable) {
environment.systemPackages = with pkgs; [
borgbackup
];
systemd.services.borgbackup = {
description = "borgbackup";
unitConfig.Documentation = "man:borgbackup";
script = borgScript;
serviceConfig = {
User = cfg.user;
Group = cfg.group;
CPUSchedulingPolicy = "idle";
IOSchedulingClass = "idle";
ProtectSystem = "full";
};
startAt = cfg.startAt;
};
};
}
================================================
FILE: mail-server/clamav.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
in
{
config = lib.mkIf (cfg.enable && cfg.virusScanning) {
services.clamav.daemon.enable = true;
services.clamav.updater.enable = true;
services.clamav.daemon.extraConfig = ''
PhishingScanURLs no
'';
};
}
================================================
FILE: mail-server/common.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, lib }:
let
cfg = config.mailserver;
# passwd :: [ String ]
passwd = lib.mapAttrsToList
(name: value: "${name}:${value.hashedPassword}:${builtins.toString cfg.vmailUID}:${builtins.toString cfg.vmailUID}::${cfg.mailDirectory}:/run/current-system/sw/bin/nologin:"
+ (if lib.isString value.quota
then "userdb_quota_rule=*:storage=${value.quota}"
else ""))
cfg.loginAccounts;
in
{
# cert :: PATH
certificatePath = if cfg.certificateScheme == 1
then cfg.certificateFile
else if cfg.certificateScheme == 2
then "${cfg.certificateDirectory}/cert-${cfg.fqdn}.pem"
else if cfg.certificateScheme == 3
then "/var/lib/acme/${cfg.fqdn}/fullchain.pem"
else throw "Error: Certificate Scheme must be in { 1, 2, 3 }";
# key :: PATH
keyPath = if cfg.certificateScheme == 1
then cfg.keyFile
else if cfg.certificateScheme == 2
then "${cfg.certificateDirectory}/key-${cfg.fqdn}.pem"
else if cfg.certificateScheme == 3
then "/var/lib/acme/${cfg.fqdn}/key.pem"
else throw "Error: Certificate Scheme must be in { 1, 2, 3 }";
# passwdFile :: PATH
passwdFile = builtins.toFile "passwd" (lib.concatStringsSep "\n" passwd);
}
================================================
FILE: mail-server/dovecot-version.nix
================================================
{ dovecot, gawk, gnused, jq, runCommand }:
runCommand "dovecot-version" {
buildInputs = [dovecot gnused jq];
} ''
jq -n \
--arg dovecot_version "$(dovecot --version |
sed 's/\([0-9.]*\).*/\1/' |
awk -F '.' '{ print $1"."$2"."$3 }')" \
'[$dovecot_version | split("."), ["major", "minor", "patch"]]
| transpose | map( { (.[1]): .[0] | tonumber }) | add' > $out
''
================================================
FILE: mail-server/dovecot.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
with (import ./common.nix { inherit config lib; });
let
cfg = config.mailserver;
maildirLayoutAppendix = lib.optionalString cfg.useFsLayout ":LAYOUT=fs";
dovecotVersion = builtins.fromJSON
(builtins.readFile (pkgs.callPackage ./dovecot-version.nix {}));
# maildir in format "/${domain}/${user}"
dovecotMaildir = "maildir:${cfg.mailDirectory}/%d/%n${maildirLayoutAppendix}";
in
{
config = with cfg; lib.mkIf enable {
services.dovecot2 = {
enable = true;
enableImap = enableImap;
enablePop3 = enablePop3;
enablePAM = false;
enableQuota = true;
mailGroup = vmailGroupName;
mailUser = vmailUserName;
mailLocation = dovecotMaildir;
sslServerCert = certificatePath;
sslServerKey = keyPath;
enableLmtp = true;
modules = [ pkgs.dovecot_pigeonhole ];
protocols = [ "sieve" ];
sieveScripts = {
after = builtins.toFile "spam.sieve" ''
require "fileinto";
if header :is "X-Spam" "Yes" {
fileinto "Junk";
stop;
}
'';
};
mailboxes = cfg.mailboxes;
extraConfig = ''
#Extra Config
${lib.optionalString debug ''
mail_debug = yes
auth_debug = yes
verbose_ssl = yes
''}
protocol imap {
mail_max_userip_connections = ${toString cfg.maxConnectionsPerUser}
}
protocol pop3 {
mail_max_userip_connections = ${toString cfg.maxConnectionsPerUser}
}
mail_access_groups = ${vmailGroupName}
ssl = required
${lib.optionalString (dovecotVersion.major == 2 && dovecotVersion.minor >= 3) ''
ssl_dh = <${certificateDirectory}/dh.pem
''}
service lmtp {
unix_listener /var/lib/postfix/queue/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix # TODO: < make variable
}
}
protocol lmtp {
mail_plugins = $mail_plugins sieve
}
passdb {
driver = passwd-file
args = ${passwdFile}
}
userdb {
driver = passwd-file
args = ${passwdFile}
}
service auth {
unix_listener /var/lib/postfix/queue/private/auth {
mode = 0660
user = postfix # TODO: < make variable
group = postfix # TODO: < make variable
}
}
auth_mechanisms = plain login
namespace inbox {
separator = ${cfg.hierarchySeparator}
inbox = yes
}
plugin {
sieve = file:/var/sieve/%u/scripts;active=/var/sieve/%u/active.sieve
sieve_default = file:/var/sieve/%u/default.sieve
sieve_default_name = default
}
lda_mailbox_autosubscribe = yes
lda_mailbox_autocreate = yes
'';
};
};
}
================================================
FILE: mail-server/environment.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
in
{
config = with cfg; lib.mkIf enable {
environment.systemPackages = with pkgs; [
dovecot opendkim openssh postfix rspamd rmilter
] ++ (if certificateScheme == 2 then [ openssl ] else []);
};
}
================================================
FILE: mail-server/kresd.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2017 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
in
{
config = lib.mkIf (cfg.enable && cfg.localDnsResolver) {
services.kresd.enable = true;
networking.nameservers = [ "127.0.0.1" ];
};
}
================================================
FILE: mail-server/monit.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
in
{
config = lib.mkIf (cfg.enable && cfg.monitoring.enable) {
services.monit = {
enable = true;
config = ''
set alert ${cfg.monitoring.alertAddress}
${cfg.monitoring.config}
'';
};
};
}
================================================
FILE: mail-server/networking.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
in
{
config = with cfg; lib.mkIf enable {
networking.firewall = {
allowedTCPPorts = [ 25 587 ]
++ lib.optional enableImap 143
++ lib.optional enableImapSsl 993
++ lib.optional enablePop3 110
++ lib.optional enablePop3Ssl 995
++ lib.optional enableManageSieve 4190
++ lib.optional (certificateScheme == 3) 80;
};
};
}
================================================
FILE: mail-server/nginx.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
with (import ./common.nix { inherit config; });
let
cfg = config.mailserver;
acmeRoot = "/var/lib/acme/acme-challenge";
in
{
config = lib.mkIf (cfg.enable && cfg.certificateScheme == 3) {
services.nginx = {
enable = true;
virtualHosts."${cfg.fqdn}" = {
serverName = cfg.fqdn;
forceSSL = true;
enableACME = true;
acmeRoot = acmeRoot;
};
};
security.acme.certs."${cfg.fqdn}".postRun = ''
systemctl reload nginx
systemctl reload postfix
systemctl reload dovecot2
'';
};
}
================================================
FILE: mail-server/post-upgrade-check.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.mailserver;
in
{
config = mkIf (cfg.enable && cfg.rebootAfterKernelUpgrade.enable) {
systemd.services.nixos-upgrade.serviceConfig.ExecStartPost = pkgs.writeScript "post-upgrade-check" ''
#!${pkgs.stdenv.shell}
# Checks whether the "current" kernel is different from the booted kernel
# and then triggers a reboot so that the "current" kernel will be the booted one.
# This is just an educated guess. If the links do not differ the kernels might still be different, according to spacefrogg in #nixos.
current=$(readlink -f /run/current-system/kernel)
booted=$(readlink -f /run/booted-system/kernel)
if [ "$current" == "$booted" ]; then
echo "kernel version seems unchanged, skipping reboot" | systemd-cat --priority 4 --identifier "post-upgrade-check";
else
echo "kernel path changed, possibly a new version" | systemd-cat --priority 2 --identifier "post-upgrade-check"
echo "$booted" | systemd-cat --priority 2 --identifier "post-upgrade-kernel-check"
echo "$current" | systemd-cat --priority 2 --identifier "post-upgrade-kernel-check"
${cfg.rebootAfterKernelUpgrade.method}
fi
'';
};
}
================================================
FILE: mail-server/postfix.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
with (import ./common.nix { inherit config lib; });
let
inherit (lib.strings) concatStringsSep;
cfg = config.mailserver;
# valiases_postfix :: [ String ]
valiases_postfix = lib.flatten (lib.mapAttrsToList
(name: value:
let to = name;
in map (from: "${from} ${to}") (value.aliases ++ lib.singleton name))
cfg.loginAccounts);
# catchAllPostfix :: [ String ]
catchAllPostfix = lib.flatten (lib.mapAttrsToList
(name: value:
let to = name;
in map (from: "@${from} ${to}") value.catchAll)
cfg.loginAccounts);
# extra_valiases_postfix :: [ String ]
extra_valiases_postfix =
(map
(from:
let to = cfg.extraVirtualAliases.${from};
aliasList = (l: let aliasStr = builtins.foldl' (x: y: x + y + ", ") "" l;
in builtins.substring 0 (builtins.stringLength aliasStr - 2) aliasStr);
in if (builtins.isList to) then "${from} " + (aliasList to)
else "${from} ${to}")
(builtins.attrNames cfg.extraVirtualAliases));
# all_valiases_postfix :: [ String ]
all_valiases_postfix = valiases_postfix ++ extra_valiases_postfix;
# valiases_file :: Path
valiases_file = builtins.toFile "valias"
(lib.concatStringsSep "\n" (all_valiases_postfix ++
catchAllPostfix));
reject_recipients_postfix = (map
(recipient:
"${recipient} REJECT")
(cfg.rejectRecipients));
# rejectRecipients :: [ Path ]
reject_recipients_file = builtins.toFile "reject_recipients" (lib.concatStringsSep "\n" (reject_recipients_postfix)) ;
# vhosts_file :: Path
vhosts_file = builtins.toFile "vhosts" (concatStringsSep "\n" cfg.domains);
# vaccounts_file :: Path
# see
# https://blog.grimneko.de/2011/12/24/a-bunch-of-tips-for-improving-your-postfix-setup/
# for details on how this file looks. By using the same file as valiases,
# every alias is owned (uniquely) by its user.
# The user's own address is already in all_valiases_postfix.
vaccounts_file = builtins.toFile "vaccounts" (lib.concatStringsSep "\n" all_valiases_postfix);
submissionHeaderCleanupRules = pkgs.writeText "submission_header_cleanup_rules" (''
# Removes sensitive headers from mails handed in via the submission port.
# See https://thomas-leister.de/mailserver-debian-stretch/
# Uses "pcre" style regex.
/^Received:/ IGNORE
/^X-Originating-IP:/ IGNORE
/^X-Mailer:/ IGNORE
/^User-Agent:/ IGNORE
/^X-Enigmail:/ IGNORE
'' + lib.optionalString cfg.rewriteMessageId ''
# Replaces the user submitted hostname with the server's FQDN to hide the
# user's host or network.
/^Message-ID:\s+<(.*?)@.*?>/ REPLACE Message-ID: <$1@${cfg.fqdn}>
'');
in
{
config = with cfg; lib.mkIf enable {
services.postfix = {
enable = true;
hostname = "${fqdn}";
networksStyle = "host";
mapFiles."valias" = valiases_file;
mapFiles."vaccounts" = vaccounts_file;
mapFiles."reject_recipients" = reject_recipients_file;
sslCert = certificatePath;
sslKey = keyPath;
enableSubmission = true;
extraConfig =
''
# Extra Config
mydestination =
smtpd_banner = ${fqdn} ESMTP NO UCE
disable_vrfy_command = yes
message_size_limit = 20971520
# virtual mail system
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_mailbox_base = ${mailDirectory}
virtual_mailbox_domains = ${vhosts_file}
virtual_mailbox_maps = hash:/var/lib/postfix/conf/valias
virtual_alias_maps = hash:/var/lib/postfix/conf/valias
virtual_transport = lmtp:unix:private/dovecot-lmtp
# sasl with dovecot
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
# reject selected recipients, quota
smtpd_recipient_restrictions = check_recipient_access hash:/var/lib/postfix/conf/reject_recipients, check_policy_service inet:localhost:12340
# TLS settings, inspired by https://github.com/jeaye/nix-files
# Submission by mail clients is handled in submissionOptions
smtpd_tls_security_level = may
# strong might suffice and is computationally less expensive
smtpd_tls_eecdh_grade = ultra
# Disable predecessors to TLS
smtpd_tls_protocols = !SSLv2, !SSLv3
# Allowing AUTH on a non encrypted connection poses a security risk
smtpd_tls_auth_only = yes
# Log only a summary message on TLS handshake completion
smtpd_tls_loglevel = 1
# Disable weak ciphers as reported by https://ssl-tools.net
# https://serverfault.com/questions/744168/how-to-disable-rc4-on-postfix
smtpd_tls_exclude_ciphers = RC4, aNULL
smtp_tls_exclude_ciphers = RC4, aNULL
# Configure a non blocking source of randomness
tls_random_source = dev:/dev/urandom
'';
submissionOptions =
{
smtpd_tls_security_level = "encrypt";
smtpd_sasl_auth_enable = "yes";
smtpd_sasl_type = "dovecot";
smtpd_sasl_path = "private/auth";
smtpd_sasl_security_options = "noanonymous";
smtpd_sasl_local_domain = "$myhostname";
smtpd_client_restrictions = "permit_sasl_authenticated,reject";
smtpd_sender_login_maps = "hash:/etc/postfix/vaccounts";
smtpd_sender_restrictions = "reject_sender_login_mismatch";
smtpd_recipient_restrictions = "reject_non_fqdn_recipient,reject_unknown_recipient_domain,permit_sasl_authenticated,reject";
cleanup_service_name = "submission-header-cleanup";
};
extraMasterConf = ''
submission-header-cleanup unix n - n - 0 cleanup
-o header_checks=pcre:${submissionHeaderCleanupRules}
'';
};
};
}
================================================
FILE: mail-server/rmilter.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
clamav = if cfg.virusScanning
then
''
clamav {
servers = /var/run/clamav/clamd.ctl;
};
''
else "";
dkim = if cfg.dkimSigning
# Note: domain = "*"; causes Rmilter to try to search key in the key path
# as keypath/domain.selector.key for any domain.
then
''
dkim {
domain {
key = "${cfg.dkimKeyDirectory}";
domain = "*";
selector = "${cfg.dkimSelector}";
};
sign_alg = sha256;
auth_only = yes;
header_canon = relaxed;
}
''
else "";
in
{
config = with cfg; lib.mkIf enable {
services.rspamd = {
enable = true;
};
services.rmilter = {
inherit debug;
enable = true;
postfix.enable = true;
rspamd = {
enable = true;
extraConfig = "extended_spam_headers = yes;";
};
extraConfig =
''
use_redis = true;
max_size = 20M;
${clamav}
${dkim}
'';
};
};
}
================================================
FILE: mail-server/rsnapshot.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.mailserver;
preexecDefined = cfg.backup.cmdPreexec != null;
preexecWrapped = pkgs.writeScript "rsnapshot-preexec.sh" ''
#!${pkgs.stdenv.shell}
set -e
${cfg.backup.cmdPreexec}
'';
preexecString = optionalString preexecDefined "cmd_preexec ${preexecWrapped}";
postexecDefined = cfg.backup.cmdPostexec != null;
postexecWrapped = pkgs.writeScript "rsnapshot-postexec.sh" ''
#!${pkgs.stdenv.shell}
set -e
${cfg.backup.cmdPostexec}
'';
postexecString = optionalString postexecDefined "cmd_postexec ${postexecWrapped}";
in {
config = mkIf (cfg.enable && cfg.backup.enable) {
services.rsnapshot = {
enable = true;
cronIntervals = cfg.backup.cronIntervals;
# rsnapshot expects intervals shortest first, e.g. hourly first, then daily.
# tabs must separate all elements
extraConfig = ''
${preexecString}
${postexecString}
snapshot_root ${cfg.backup.snapshotRoot}/
retain hourly ${toString cfg.backup.retain.hourly}
retain daily ${toString cfg.backup.retain.daily}
retain weekly ${toString cfg.backup.retain.weekly}
backup ${cfg.mailDirectory}/ localhost/
'';
};
};
}
================================================
FILE: mail-server/services.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
# cert :: PATH
cert = if cfg.certificateScheme == 1
then cfg.certificateFile
else if cfg.certificateScheme == 2
then "${cfg.certificateDirectory}/cert-${cfg.fqdn.pem"
else "";
# key :: PATH
key = if cfg.certificateScheme == 1
then cfg.keyFile
else if cfg.certificateScheme == 2
then "${cfg.certificateDirectory}/key-${cfg.fqdn}.pem"
else "";
in
{
imports = [
./rmilter.nix
./postfix.nix key
./dovecot.nix
];
}
================================================
FILE: mail-server/systemd.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
create_certificate = if cfg.certificateScheme == 2 then
''
# Create certificates if they do not exist yet
dir="${cfg.certificateDirectory}"
fqdn="${cfg.fqdn}"
case $fqdn in /*) fqdn=$(cat "$fqdn");; esac
key="''${dir}/key-${cfg.fqdn}.pem";
cert="''${dir}/cert-${cfg.fqdn}.pem";
if [ ! -f "''${key}" ] || [ ! -f "''${cert}" ]
then
mkdir -p "${cfg.certificateDirectory}"
(umask 077; "${pkgs.openssl}/bin/openssl" genrsa -out "''${key}" 2048) &&
"${pkgs.openssl}/bin/openssl" req -new -key "''${key}" -x509 -subj "/CN=''${fqdn}" \
-days 3650 -out "''${cert}"
fi
''
else "";
createDhParameterFile =
''
# Create a dh parameter file
if [ ! -s "${cfg.certificateDirectory}/dh.pem" ]
then
mkdir -p "${cfg.certificateDirectory}"
${pkgs.openssl}/bin/openssl \
dhparam ${builtins.toString cfg.dhParamBitLength} \
> "${cfg.certificateDirectory}/dh.pem"
fi
'';
createDomainDkimCert = dom:
let
dkim_key = "${cfg.dkimKeyDirectory}/${dom}.${cfg.dkimSelector}.key";
dkim_txt = "${cfg.dkimKeyDirectory}/${dom}.${cfg.dkimSelector}.txt";
in
''
if [ ! -f "${dkim_key}" ] || [ ! -f "${dkim_txt}" ]
then
${pkgs.opendkim}/bin/opendkim-genkey -s "${cfg.dkimSelector}" \
-d "${dom}" \
--directory="${cfg.dkimKeyDirectory}"
mv "${cfg.dkimKeyDirectory}/${cfg.dkimSelector}.private" "${dkim_key}"
mv "${cfg.dkimKeyDirectory}/${cfg.dkimSelector}.txt" "${dkim_txt}"
fi
'';
createAllCerts = lib.concatStringsSep "\n" (map createDomainDkimCert cfg.domains);
create_dkim_cert =
''
# Create dkim dir
mkdir -p "${cfg.dkimKeyDirectory}"
chown rmilter:rmilter "${cfg.dkimKeyDirectory}"
${createAllCerts}
chown -R rmilter:rmilter "${cfg.dkimKeyDirectory}"
'';
in
{
config = with cfg; lib.mkIf enable {
# Make sure postfix gets started first, so that the certificates are in place
systemd.services.dovecot2.after = [ "postfix.service" ];
# Create certificates and maildir folder
systemd.services.postfix = {
after = (if (certificateScheme == 3) then [ "nginx.service" ] else []);
preStart =
''
# Create mail directory and set permissions. See
# <http://wiki2.dovecot.org/SharedMailboxes/Permissions>.
mkdir -p "${mailDirectory}"
chgrp "${vmailGroupName}" "${mailDirectory}"
chmod 02770 "${mailDirectory}"
${create_certificate}
${let
dovecotVersion = builtins.fromJSON
(builtins.readFile (pkgs.callPackage ./dovecot-version.nix {}));
in lib.optionalString
(dovecotVersion.major == 2 && dovecotVersion.minor >= 3)
createDhParameterFile}
'';
};
# Create dkim certificates
systemd.services.rmilter = {
requires = [ "rmilter.socket" ];
after = [ "rmilter.socket" ];
preStart =
''
${create_dkim_cert}
'';
};
};
}
================================================
FILE: mail-server/users.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
with config.mailserver;
let
vmail_user = {
name = vmailUserName;
isNormalUser = false;
uid = vmailUID;
home = mailDirectory;
createHome = true;
group = vmailGroupName;
};
virtualMailUsersActivationScript = pkgs.writeScript "activate-virtual-mail-users" ''
#!${pkgs.stdenv.shell}
set -euo pipefail
# Create directory to store user sieve scripts if it doesn't exist
if (! test -d "/var/sieve"); then
mkdir "/var/sieve"
chown "${vmailUserName}:${vmailGroupName}" "/var/sieve"
chmod 770 "/var/sieve"
fi
# Copy user's sieve script to the correct location (if it exists). If it
# is null, remove the file.
${lib.concatMapStringsSep "\n" ({ name, sieveScript }:
if lib.isString sieveScript then ''
if (! test -d "/var/sieve/${name}"); then
mkdir -p "/var/sieve/${name}"
chown "${vmailUserName}:${vmailGroupName}" "/var/sieve/${name}"
chmod 770 "/var/sieve/${name}"
fi
cat << 'EOF' > "/var/sieve/${name}/default.sieve"
${sieveScript}
EOF
chown "${vmailUserName}:${vmailGroupName}" "/var/sieve/${name}/default.sieve"
'' else ''
if (test -f "/var/sieve/${name}/default.sieve"); then
rm "/var/sieve/${name}/default.sieve"
fi
if (test -f "/var/sieve/${name}.svbin"); then
rm "/var/sieve/${name}/default.svbin"
fi
'') (map (user: { inherit (user) name sieveScript; })
(lib.attrValues loginAccounts))}
'';
in {
config = lib.mkIf enable {
# set the vmail gid to a specific value
users.groups = {
"${vmailGroupName}" = { gid = vmailUID; };
};
# define all users
users.users = {
"${vmail_user.name}" = lib.mkForce vmail_user;
};
systemd.services.activate-virtual-mail-users = {
wantedBy = [ "multi-user.target" ];
before = [ "dovecot2.service" ];
serviceConfig = {
ExecStart = virtualMailUsersActivationScript;
};
enable = true;
};
};
}
================================================
FILE: nixops/single-server.nix
================================================
{
network.description = "mail server";
mailserver =
{ config, pkgs, ... }:
{
imports = [
./../default.nix
];
mailserver = {
enable = true;
fqdn = "mail.example.com";
domains = [ "example.com" "example2.com" ];
loginAccounts = {
"user1@example.com" = {
hashedPassword = "$6$/z4n8AQl6K$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/";
};
};
virtualAliases = {
"info@example.com" = "user1@example.com";
"postmaster@example.com" = "user1@example.com";
"abuse@example.com" = "user1@example.com";
"user1@example2.com" = "user1@example.com";
"info@example2.com" = "user1@example.com";
"postmaster@example2.com" = "user1@example.com";
"abuse@example2.com" = "user1@example.com";
};
};
};
}
================================================
FILE: nixops/vbox.nix
================================================
{
mailserver =
{ config, pkgs, ... }:
{ deployment.targetEnv = "virtualbox";
deployment.virtualbox.memorySize = 1024; # megabytes
deployment.virtualbox.vcpu = 2; # number of cpus
deployment.virtualbox.headless = true;
};
}
================================================
FILE: tests/extern.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
import <nixpkgs/nixos/tests/make-test.nix> {
nodes = {
server = { config, pkgs, ... }:
{
imports = [
../default.nix
];
mailserver = {
enable = true;
debug = true;
fqdn = "mail.example.com";
domains = [ "example.com" "example2.com" ];
dhParamBitLength = 512;
rewriteMessageId = true;
loginAccounts = {
"user1@example.com" = {
hashedPassword = "$6$/z4n8AQl6K$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/";
aliases = [ "postmaster@example.com" ];
catchAll = [ "example.com" ];
};
"user2@example.com" = {
hashedPassword = "$6$u61JrAtuI0a$nGEEfTP5.eefxoScUGVG/Tl0alqla2aGax4oTd85v3j3xSmhv/02gNfSemv/aaMinlv9j/ZABosVKBrRvN5Qv0";
aliases = [ "chuck@example.com" ];
};
"user@example2.com" = {
hashedPassword = "$6$u61JrAtuI0a$nGEEfTP5.eefxoScUGVG/Tl0alqla2aGax4oTd85v3j3xSmhv/02gNfSemv/aaMinlv9j/ZABosVKBrRvN5Qv0";
};
"lowquota@example.com" = {
hashedPassword = "$6$u61JrAtuI0a$nGEEfTP5.eefxoScUGVG/Tl0alqla2aGax4oTd85v3j3xSmhv/02gNfSemv/aaMinlv9j/ZABosVKBrRvN5Qv0";
quota = "1B";
};
};
extraVirtualAliases = {
"single-alias@example.com" = "user1@example.com";
"multi-alias@example.com" = [ "user1@example.com" "user2@example.com" ];
};
enableImap = true;
};
};
client = { nodes, config, pkgs, ... }: let
serverIP = nodes.server.config.networking.primaryIPAddress;
clientIP = nodes.client.config.networking.primaryIPAddress;
grep-ip = pkgs.writeScriptBin "grep-ip" ''
#!${pkgs.stdenv.shell}
echo grep '${clientIP}' "$@" >&2
exec grep '${clientIP}' "$@"
'';
check-mail-id = pkgs.writeScriptBin "check-mail-id" ''
#!${pkgs.stdenv.shell}
echo grep '^Message-ID:.*@mail.example.com>$' "$@" >&2
exec grep '^Message-ID:.*@mail.example.com>$' "$@"
'';
in {
environment.systemPackages = with pkgs; [
fetchmail msmtp procmail findutils grep-ip check-mail-id
];
environment.etc = {
"root/.fetchmailrc" = {
text = ''
poll ${serverIP} with proto IMAP
user 'user1@example.com' there with password 'user1' is 'root' here
mda procmail
'';
mode = "0700";
};
"root/.fetchmailRcLowQuota" = {
text = ''
poll ${serverIP} with proto IMAP
user 'lowquota\@example.com' there with password 'user1' is 'root' here
mda procmail
'';
mode = "0700";
};
"root/.procmailrc" = {
text = "DEFAULT=$HOME/mail";
};
"root/.msmtprc" = {
text = ''
account test
host ${serverIP}
port 587
from user2@example.com
user user2@example.com
password user2
account test2
host ${serverIP}
port 587
from user@example2.com
user user@example2.com
password user2
account test3
host ${serverIP}
port 587
from chuck@example.com
user user2@example.com
password user2
account test4
host ${serverIP}
port 587
from postmaster@example.com
user user1@example.com
password user1
account test5
host ${serverIP}
port 587
from single-alias@example.com
user user1@example.com
password user1
'';
};
"root/email1".text = ''
Message-ID: <12345qwerty@host.local.network>
From: User2 <user2@example.com>
To: User1 <user1@example.com>
Cc:
Bcc:
Subject: This is a test Email from user2 to user1
Reply-To:
Hello User1,
how are you doing today?
'';
"root/email2".text = ''
Message-ID: <232323abc@host.local.network>
From: User <user@example2.com>
To: User1 <user1@example.com>
Cc:
Bcc:
Subject: This is a test Email from user@example2.com to user1
Reply-To:
Hello User1,
how are you doing today?
XOXO User1
'';
"root/email3".text = ''
Message-ID: <asdfghjkl42@host.local.network>
From: Postmaster <postmaster@example.com>
To: Chuck <chuck@example.com>
Cc:
Bcc:
Subject: This is a test Email from postmaster\@example.com to chuck
Reply-To:
Hello Chuck,
I think I may have misconfigured the mail server
XOXO Postmaster
'';
"root/email4".text = ''
Message-ID: <sdfsdf@host.local.network>
From: Single Alias <single-alias@example.com>
To: User1 <user1@example.com>
Cc:
Bcc:
Subject: This is a test Email from single-alias\@example.com to user1
Reply-To:
Hello User1,
how are you doing today?
XOXO User1 aka Single Alias
'';
"root/email5".text = ''
Message-ID: <789asdf@host.local.network>
From: User2 <user2@example.com>
To: Multi Alias <multi-alias@example.com>
Cc:
Bcc:
Subject: This is a test Email from user2\@example.com to multi-alias
Reply-To:
Hello Multi Alias,
how are we doing today?
XOXO User1
'';
};
};
};
testScript =
''
startAll;
$server->waitForUnit("multi-user.target");
$client->waitForUnit("multi-user.target");
$client->execute("cp -p /etc/root/.* ~/");
$client->succeed("mkdir ~/mail");
$client->succeed("ls -la ~/ >&2");
$client->succeed("cat ~/.fetchmailrc >&2");
$client->succeed("cat ~/.procmailrc >&2");
$client->succeed("cat ~/.msmtprc >&2");
subtest "imap retrieving mail", sub {
# fetchmail returns EXIT_CODE 1 when no new mail
$client->succeed("fetchmail -v || [ \$? -eq 1 ] >&2");
};
subtest "submission port send mail", sub {
# send email from user2 to user1
$client->succeed("msmtp -a test --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email1 >&2");
# give the mail server some time to process the mail
$server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
};
subtest "imap retrieving mail 2", sub {
$client->execute("rm ~/mail/*");
# fetchmail returns EXIT_CODE 0 when it retrieves mail
$client->succeed("fetchmail -v >&2");
};
subtest "remove sensitive information on submission port", sub {
$client->succeed("cat ~/mail/* >&2");
## make sure our IP is _not_ in the email header
$client->fail("grep-ip ~/mail/*");
$client->succeed("check-mail-id ~/mail/*");
};
subtest "have correct fqdn as sender", sub {
$client->succeed("grep 'Received: from mail.example.com' ~/mail/*");
};
subtest "dkim singing, multiple domains", sub {
$client->execute("rm ~/mail/*");
# send email from user2 to user1
$client->succeed("msmtp -a test2 --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email2 >&2");
$server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
# fetchmail returns EXIT_CODE 0 when it retrieves mail
$client->succeed("fetchmail -v");
$client->succeed("cat ~/mail/* >&2");
# make sure it is dkim signed
$client->succeed("grep DKIM ~/mail/*");
};
subtest "aliases", sub {
$client->execute("rm ~/mail/*");
# send email from chuck to postmaster
$client->succeed("msmtp -a test3 --tls=on --tls-certcheck=off --auth=on postmaster\@example.com < /etc/root/email2 >&2");
$server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
# fetchmail returns EXIT_CODE 0 when it retrieves mail
$client->succeed("fetchmail -v");
};
subtest "catchAlls", sub {
$client->execute("rm ~/mail/*");
# send email from chuck to non exsitent account
$client->succeed("msmtp -a test3 --tls=on --tls-certcheck=off --auth=on lol\@example.com < /etc/root/email2 >&2");
$server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
# fetchmail returns EXIT_CODE 0 when it retrieves mail
$client->succeed("fetchmail -v");
$client->execute("rm ~/mail/*");
# send email from user1 to chuck
$client->succeed("msmtp -a test4 --tls=on --tls-certcheck=off --auth=on chuck\@example.com < /etc/root/email2 >&2");
$server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
# fetchmail returns EXIT_CODE 1 when no new mail
# if this succeeds, it means that user1 recieved the mail that was intended for chuck.
$client->fail("fetchmail -v");
};
subtest "extraVirtualAliases", sub {
$client->execute("rm ~/mail/*");
# send email from single-alias to user1
$client->succeed("msmtp -a test5 --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email4 >&2");
$server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
# fetchmail returns EXIT_CODE 0 when it retrieves mail
$client->succeed("fetchmail -v");
$client->execute("rm ~/mail/*");
# send email from user1 to multi-alias (user{1,2}@example.com)
$client->succeed("msmtp -a test --tls=on --tls-certcheck=off --auth=on multi-alias\@example.com < /etc/root/email5 >&2");
$server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
# fetchmail returns EXIT_CODE 0 when it retrieves mail
$client->succeed("fetchmail -v");
};
subtest "quota", sub {
$client->execute("rm ~/mail/*");
$client->execute("mv ~/.fetchmailRcLowQuota ~/.fetchmailrc");
$client->succeed("msmtp -a test3 --tls=on --tls-certcheck=off --auth=on lowquota\@example.com < /etc/root/email2 >&2");
$server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
# fetchmail returns EXIT_CODE 0 when it retrieves mail
$client->fail("fetchmail -v");
};
subtest "no warnings or errors", sub {
$server->fail("journalctl -u postfix | grep -i error >&2");
$server->fail("journalctl -u postfix | grep -i warning >&2");
$server->fail("journalctl -u dovecot2 | grep -i error >&2");
$server->fail("journalctl -u dovecot2 | grep -i warning >&2");
};
'';
}
================================================
FILE: tests/intern.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
import <nixpkgs/nixos/tests/make-test.nix> {
machine =
{ config, pkgs, ... }:
{
imports = [
./../default.nix
];
mailserver = {
enable = true;
fqdn = "mail.example.com";
domains = [ "example.com" ];
dhParamBitLength = 512;
loginAccounts = {
"user1@example.com" = {
hashedPassword = "$6$/z4n8AQl6K$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/";
};
};
vmailGroupName = "vmail";
vmailUID = 5000;
};
};
testScript =
''
$machine->start;
$machine->waitForUnit("multi-user.target");
subtest "vmail gid is set correctly", sub {
$machine->succeed("getent group vmail | grep 5000");
};
'';
}
================================================
FILE: tests/minimal.nix
================================================
# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
import ./../../nixpkgs/nixos/tests/make-test.nix {
machine =
{ config, pkgs, ... }:
{
imports = [
./../default.nix
];
};
testScript =
''
$machine->waitForUnit("multi-user.target");
'';
}
================================================
FILE: update.sh
================================================
#!/usr/bin/env bash
sed -i -e "s/v[0-9]\+\.[0-9]\+\.[0-9]\+/$1/g" README.md
gitextract_d0n5qxfj/ ├── .editorconfig ├── .gitignore ├── .travis.yml ├── ISSUE_TEMPLATE.md ├── LICENSE ├── README.md ├── default.nix ├── mail-server/ │ ├── borgbackup.nix │ ├── clamav.nix │ ├── common.nix │ ├── dovecot-version.nix │ ├── dovecot.nix │ ├── environment.nix │ ├── kresd.nix │ ├── monit.nix │ ├── networking.nix │ ├── nginx.nix │ ├── post-upgrade-check.nix │ ├── postfix.nix │ ├── rmilter.nix │ ├── rsnapshot.nix │ ├── services.nix │ ├── systemd.nix │ └── users.nix ├── nixops/ │ ├── single-server.nix │ └── vbox.nix ├── tests/ │ ├── extern.nix │ ├── intern.nix │ └── minimal.nix └── update.sh
Condensed preview — 30 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (122K chars).
[
{
"path": ".editorconfig",
"chars": 147,
"preview": "root = true\n\n[*]\ncharset = utf-8\nend_of_line = lf\nindent_style = space\nindent_size = 2\ninsert_final_newline = true\ntrim_"
},
{
"path": ".gitignore",
"chars": 7,
"preview": "result\n"
},
{
"path": ".travis.yml",
"chars": 284,
"preview": "language: nix\nenv:\n - NIX_PATH=\"nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-18.03.tar.gz\"\n - N"
},
{
"path": "ISSUE_TEMPLATE.md",
"chars": 285,
"preview": "(Use this template for bugs, feel free to delete it for other issues)\n\n#### SNM Version: (e.g. v2.1.3)\n#### Nixos Versio"
},
{
"path": "LICENSE",
"chars": 35141,
"preview": " GNU GENERAL PUBLIC LICENSE\n Version 3, 29 June 2007\n\n Copyright (C) 2007 Free "
},
{
"path": "README.md",
"chars": 3576,
"preview": "# ![Simple Nixos MailServer][logo]\n\n![status](https"
},
{
"path": "default.nix",
"chars": 23889,
"preview": "\n# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software:"
},
{
"path": "mail-server/borgbackup.nix",
"chars": 3246,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/clamav.nix",
"chars": 1022,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/common.nix",
"chars": 2091,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/dovecot-version.nix",
"chars": 399,
"preview": "{ dovecot, gawk, gnused, jq, runCommand }:\n\nrunCommand \"dovecot-version\" {\n buildInputs = [dovecot gnused jq];\n} ''\n j"
},
{
"path": "mail-server/dovecot.nix",
"chars": 3686,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/environment.nix",
"chars": 1003,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/kresd.nix",
"chars": 941,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2017 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/monit.nix",
"chars": 1022,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/networking.nix",
"chars": 1173,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/nginx.nix",
"chars": 1322,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/post-upgrade-check.nix",
"chars": 1984,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/postfix.nix",
"chars": 6843,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/rmilter.nix",
"chars": 1921,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/rsnapshot.nix",
"chars": 1992,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/services.nix",
"chars": 1317,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/systemd.nix",
"chars": 4124,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "mail-server/users.nix",
"chars": 2815,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "nixops/single-server.nix",
"chars": 998,
"preview": "{\n network.description = \"mail server\";\n\n mailserver =\n { config, pkgs, ... }:\n {\n imports = [\n "
},
{
"path": "nixops/vbox.nix",
"chars": 255,
"preview": "{\n mailserver =\n { config, pkgs, ... }:\n { deployment.targetEnv = \"virtualbox\";\n deployment.virtualbox.memor"
},
{
"path": "tests/extern.nix",
"chars": 12709,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "tests/intern.nix",
"chars": 1589,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "tests/minimal.nix",
"chars": 976,
"preview": "# nixos-mailserver: a simple mail server\n# Copyright (C) 2016-2018 Robin Raymond\n#\n# This program is free software: "
},
{
"path": "update.sh",
"chars": 77,
"preview": "#!/usr/bin/env bash\n\nsed -i -e \"s/v[0-9]\\+\\.[0-9]\\+\\.[0-9]\\+/$1/g\" README.md\n"
}
]
About this extraction
This page contains the full source code of the r-raymond/nixos-mailserver GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 30 files (114.1 KB), approximately 28.5k tokens. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.
Extracted by GitExtract — free GitHub repo to text converter for AI. Built by Nikandr Surkov.