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-rw-r--r--krebs/3modules/exim-retiolum.nix143
1 files changed, 143 insertions, 0 deletions
diff --git a/krebs/3modules/exim-retiolum.nix b/krebs/3modules/exim-retiolum.nix
new file mode 100644
index 000000000..71c091917
--- /dev/null
+++ b/krebs/3modules/exim-retiolum.nix
@@ -0,0 +1,143 @@
+{ config, pkgs, lib, ... }:
+
+with builtins;
+with lib;
+let
+ cfg = config.krebs.exim-retiolum;
+
+ out = {
+ options.krebs.exim-retiolum = api;
+ config =
+ # This configuration makes only sense for retiolum-enabled hosts.
+ # TODO modular configuration
+ mkIf cfg.enable (
+ #assert config.krebs.retiolum.enable;
+ imp);
+ };
+
+ api = {
+ enable = mkEnableOption "krebs.exim-retiolum";
+ };
+
+ imp = {
+ services.exim = {
+ enable = true;
+ config = ''
+ primary_hostname = ${retiolumHostname}
+ domainlist local_domains = @ : localhost
+ domainlist relay_to_domains = *.retiolum
+ hostlist relay_from_hosts = <; 127.0.0.1 ; ::1
+
+ 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
+
+ begin acl
+
+ acl_check_rcpt:
+ accept hosts = :
+ control = dkim_disable_verify
+
+ deny message = Restricted characters in address
+ domains = +local_domains
+ local_parts = ^[.] : ^.*[@%!/|]
+
+ deny message = Restricted characters in address
+ domains = !+local_domains
+ local_parts = ^[./|] : ^.*[@%!] : ^.*/\\.\\./
+
+ accept local_parts = postmaster
+ domains = +local_domains
+
+ #accept
+ # hosts = *.retiolum
+ # domains = *.retiolum
+ # control = dkim_disable_verify
+
+ #require verify = sender
+
+ accept hosts = +relay_from_hosts
+ control = submission
+ control = dkim_disable_verify
+
+ accept authenticated = *
+ control = submission
+ control = dkim_disable_verify
+
+ require message = relay not permitted
+ domains = +local_domains : +relay_to_domains
+
+ require verify = recipient
+
+ accept
+
+
+ acl_check_data:
+ accept
+
+
+ begin routers
+
+ retiolum:
+ driver = manualroute
+ domains = ! ${retiolumHostname} : *.retiolum
+ transport = remote_smtp
+ route_list = ^.* $0 byname
+ no_more
+
+ nonlocal:
+ debug_print = "R: nonlocal for $local_part@$domain"
+ driver = redirect
+ domains = ! +local_domains
+ allow_fail
+ data = :fail: Mailing to remote domains not supported
+ no_more
+
+ local_user:
+ # debug_print = "R: local_user for $local_part@$domain"
+ driver = accept
+ check_local_user
+ # local_part_suffix = +* : -*
+ # local_part_suffix_optional
+ transport = home_maildir
+ cannot_route_message = Unknown user
+
+
+ begin transports
+
+ remote_smtp:
+ driver = smtp
+
+ home_maildir:
+ driver = appendfile
+ maildir_format
+ directory = $home/Maildir
+ directory_mode = 0700
+ delivery_date_add
+ envelope_to_add
+ return_path_add
+ # group = mail
+ # mode = 0660
+
+ begin retry
+ *.retiolum * F,42d,1m
+ * * F,2h,15m; G,16h,1h,1.5; F,4d,6h
+
+ begin rewrite
+
+ begin authenticators
+ '';
+ };
+ };
+
+ # TODO get the hostname from somewhere else.
+ retiolumHostname = "${config.networking.hostName}.retiolum";
+in
+out