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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.stalwart-mail;
configFormat = pkgs.formats.toml { };
configFile = configFormat.generate "stalwart-mail.toml" cfg.settings;
dataDir = "/var/lib/stalwart-mail";
useLegacyStorage = versionOlder config.system.stateVersion "24.11";
in {
options.services.stalwart-mail = {
enable = mkEnableOption "the Stalwart all-in-one email server";
package = mkPackageOption pkgs "stalwart-mail" { };
settings = mkOption {
inherit (configFormat) type;
default = { };
description = ''
Configuration options for the Stalwart email server.
See <https://stalw.art/docs/category/configuration> for available options.
By default, the module is configured to store everything locally.
'';
};
};
config = mkIf cfg.enable {
# Default config: all local
services.stalwart-mail.settings = {
tracer.stdout = {
type = mkDefault "stdout";
level = mkDefault "info";
ansi = mkDefault false; # no colour markers to journald
enable = mkDefault true;
};
store = if useLegacyStorage then {
# structured data in SQLite, blobs on filesystem
db.type = mkDefault "sqlite";
db.path = mkDefault "${dataDir}/data/index.sqlite3";
fs.type = mkDefault "fs";
fs.path = mkDefault "${dataDir}/data/blobs";
} else {
# everything in RocksDB
db.type = mkDefault "rocksdb";
db.path = mkDefault "${dataDir}/db";
db.compression = mkDefault "lz4";
};
storage.data = mkDefault "db";
storage.fts = mkDefault "db";
storage.lookup = mkDefault "db";
storage.blob = mkDefault (if useLegacyStorage then "fs" else "db");
directory.internal.type = mkDefault "internal";
directory.internal.store = mkDefault "db";
storage.directory = mkDefault "internal";
resolver.type = mkDefault "system";
resolver.public-suffix = lib.mkDefault [
"file://${pkgs.publicsuffix-list}/share/publicsuffix/public_suffix_list.dat"
];
config.resource = {
spam-filter = lib.mkDefault "file://${cfg.package}/etc/stalwart/spamfilter.toml";
};
};
# This service stores a potentially large amount of data.
# Running it as a dynamic user would force chown to be run everytime the
# service is restarted on a potentially large number of files.
# That would cause unnecessary and unwanted delays.
users = {
groups.stalwart-mail = { };
users.stalwart-mail = {
isSystemUser = true;
group = "stalwart-mail";
};
};
systemd = {
packages = [ cfg.package ];
services.stalwart-mail = {
wantedBy = [ "multi-user.target" ];
after = [ "local-fs.target" "network.target" ];
preStart = if useLegacyStorage then ''
mkdir -p ${dataDir}/data/blobs
'' else ''
mkdir -p ${dataDir}/db
'';
serviceConfig = {
ExecStart = [
""
"${cfg.package}/bin/stalwart-mail --config=${configFile}"
];
StandardOutput = "journal";
StandardError = "journal";
StateDirectory = "stalwart-mail";
# Bind standard privileged ports
AmbientCapabilities = [ "CAP_NET_BIND_SERVICE" ];
CapabilityBoundingSet = [ "CAP_NET_BIND_SERVICE" ];
# Hardening
DeviceAllow = [ "" ];
LockPersonality = true;
MemoryDenyWriteExecute = true;
PrivateDevices = true;
PrivateUsers = false; # incompatible with CAP_NET_BIND_SERVICE
ProcSubset = "pid";
PrivateTmp = true;
ProtectClock = true;
ProtectControlGroups = true;
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
ProtectProc = "invisible";
ProtectSystem = "strict";
RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
RestrictNamespaces = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
SystemCallArchitectures = "native";
SystemCallFilter = [ "@system-service" "~@privileged" ];
UMask = "0077";
};
unitConfig.ConditionPathExists = [
""
"${configFile}"
];
};
};
# Make admin commands available in the shell
environment.systemPackages = [ cfg.package ];
};
meta = {
maintainers = with maintainers; [ happysalada pacien onny ];
};
}
|
