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# 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;
postfixCfg = config.services.postfix;
rspamdCfg = config.services.rspamd;
rspamdSocket = "rspamd.service";
in
{
config = with cfg; lib.mkIf enable {
services.rspamd = {
enable = true;
inherit debug;
locals = {
"milter_headers.conf" = { text = ''
extended_spam_headers = yes;
''; };
"redis.conf" = { text = ''
servers = "${cfg.redis.address}:${toString cfg.redis.port}";
'' + (lib.optionalString (cfg.redis.password != null) ''
password = "${cfg.redis.password}";
''); };
"classifier-bayes.conf" = { text = ''
cache {
backend = "redis";
}
''; };
"antivirus.conf" = lib.mkIf cfg.virusScanning { text = ''
clamav {
action = "reject";
symbol = "CLAM_VIRUS";
type = "clamav";
log_clean = true;
servers = "/run/clamav/clamd.ctl";
scan_mime_parts = false; # scan mail as a whole unit, not parts. seems to be needed to work at all
}
''; };
"dkim_signing.conf" = { text = ''
# Disable outbound email signing, we use opendkim for this
enabled = false;
''; };
};
overrides = {
"milter_headers.conf" = {
text = ''
extended_spam_headers = true;
'';
};
};
workers.rspamd_proxy = {
type = "rspamd_proxy";
bindSockets = [{
socket = "/run/rspamd/rspamd-milter.sock";
mode = "0664";
}];
count = 1; # Do not spawn too many processes of this type
extraConfig = ''
milter = yes; # Enable milter mode
timeout = 120s; # Needed for Milter usually
upstream "local" {
default = yes; # Self-scan upstreams are always default
self_scan = yes; # Enable self-scan
}
'';
};
workers.controller = {
type = "controller";
count = 1;
bindSockets = [{
socket = "/run/rspamd/worker-controller.sock";
mode = "0666";
}];
includes = [];
extraConfig = ''
static_dir = "''${WWWDIR}"; # Serve the web UI static assets
'';
};
};
services.redis.enable = true;
assertions = [
{
assertion = isNull config.services.redis.unixSocket;
message = "nixos-mailserver doesn't support redis over UNIX socket";
}
];
systemd.services.rspamd = {
requires = [ "redis.service" ] ++ (lib.optional cfg.virusScanning "clamav-daemon.service");
after = [ "redis.service" ] ++ (lib.optional cfg.virusScanning "clamav-daemon.service");
};
systemd.services.postfix = {
after = [ rspamdSocket ];
requires = [ rspamdSocket ];
};
users.extraUsers.${postfixCfg.user}.extraGroups = [ rspamdCfg.group ];
};
}
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