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|
{ config, pkgs, lib, ... }:
with import ../../lib/pure.nix { inherit lib; }; let
cfg = config.krebs.exim-retiolum;
# Due to improvements to the JSON notation, braces around top-level objects
# are not necessary^Wsupported by rspamd's parser when including files:
# https://github.com/rspamd/rspamd/issues/2674
toMostlyJSON = value:
assert typeOf value == "set";
(s: substring 1 (stringLength s - 2) s)
(toJSON value);
to-lsearch = concatMapStrings ({ from, to, ... }: "${from}: ${to}\n");
lsearch = mapAttrs (name: set: toFile name (to-lsearch set)) ({
inherit (cfg) system-aliases;
});
in {
options.krebs.exim-retiolum = {
enable = mkEnableOption "krebs.exim-retiolum";
local_domains = mkOption {
type = with types; listOf hostname;
default = ["localhost"] ++ config.krebs.build.host.nets.retiolum.aliases;
};
primary_hostname = mkOption {
type = types.str;
default = let x = "${config.krebs.build.host.name}.r"; in
assert elem x config.krebs.build.host.nets.retiolum.aliases;
x;
};
relay_to_domains = mkOption {
# TODO hostname with wildcards
type = with types; listOf str;
default = [
"*.r"
];
};
rspamd = {
enable = mkEnableOption "krebs.exim-retiolum.rspamd" // {
default = false;
};
locals = {
logging = {
level = mkOption {
type = types.enum [
"error"
"warning"
"notice"
"info"
"debug"
"silent"
];
default = "notice";
};
};
options = {
local_networks = mkOption {
type = types.listOf types.cidr;
default = [
config.krebs.build.host.nets.retiolum.ip4.prefix
config.krebs.build.host.nets.retiolum.ip6.prefix
];
};
};
};
};
system-aliases = mkOption {
type = types.listOf (types.submodule ({
options = {
from = mkOption {
type = types.str; # TODO e-mail address
};
to = mkOption {
type = types.str; # TODO e-mail address / TODO listOf
};
};
}));
default = [];
};
};
imports = [
{
config = lib.mkIf cfg.rspamd.enable {
services.rspamd.enable = true;
services.rspamd.locals =
mapAttrs'
(name: value: nameValuePair "${name}.inc" {
text = toMostlyJSON value;
})
cfg.rspamd.locals;
users.users.${config.krebs.exim.user.name}.extraGroups = [
config.services.rspamd.group
];
};
}
];
config = lib.mkIf cfg.enable {
krebs.exim = {
enable = true;
config =
# This configuration makes only sense for retiolum-enabled hosts.
# TODO modular configuration
assert config.krebs.tinc.retiolum.enable;
/* exim */ ''
keep_environment =
primary_hostname = ${cfg.primary_hostname}
domainlist local_domains = ${concatStringsSep ":" cfg.local_domains}
domainlist relay_to_domains = ${concatStringsSep ":" cfg.relay_to_domains}
${optionalString cfg.rspamd.enable /* exim */ ''
spamd_address = /run/rspamd/rspamd.sock variant=rspamd
''}
acl_smtp_rcpt = acl_check_rcpt
acl_smtp_data = acl_check_data
host_lookup = *
rfc1413_hosts = *
rfc1413_query_timeout = 5s
log_file_path = syslog
syslog_timestamp = false
syslog_duplication = false
tls_advertise_hosts =
begin acl
acl_check_rcpt:
deny
local_parts = ^[./|] : ^.*[@%!] : ^.*/\\.\\./
message = restricted characters in address
accept
domains = +local_domains : +relay_to_domains
deny
message = relay not permitted
acl_check_data:
${optionalString cfg.rspamd.enable /* exim */ ''
accept condition = ''${if eq{$interface_port}{587}}
warn remove_header = ${concatStringsSep " : " [
"x-spam"
"x-spam-report"
"x-spam-score"
]}
warn
spam = nobody:true
warn
condition = ''${if !eq{$spam_action}{no action}}
add_header = X-Spam: Yes
add_header = X-Spam-Report: $spam_report
add_header = X-Spam-Score: $spam_score
''}
accept
begin routers
system_aliases:
debug_print = "R: system_aliases for $local_part@$domain"
driver = redirect
data = ''${lookup{$local_part}lsearch{${lsearch.system-aliases}}}
local:
driver = accept
domains = +local_domains
check_local_user
# local_part_suffix = +*
# local_part_suffix_optional
transport = home_maildir
remote:
driver = manualroute
domains = +relay_to_domains
transport = remote_smtp
route_list = ^.* $0 byname
begin transports
remote_smtp:
driver = smtp
home_maildir:
driver = appendfile
maildir_format
directory = $home/Maildir
directory_mode = 0700
delivery_date_add
envelope_to_add
return_path_add
# group = mail
# mode = 0660
begin retry
${concatMapStringsSep "\n" (k: "${k} * F,42d,1m") cfg.relay_to_domains}
* * F,2h,15m; G,16h,1h,1.5; F,4d,6h
begin rewrite
begin authenticators
'';
};
};
}
|
