1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
{ config, pkgs, lib, ... }:
with config.krebs.lib;
let
cfg = config.krebs.exim-retiolum;
out = {
options.krebs.exim-retiolum = api;
config = lib.mkIf cfg.enable imp;
};
api = {
enable = mkEnableOption "krebs.exim-retiolum";
};
imp = {
services.exim = {
enable = true;
config =
# This configuration makes only sense for retiolum-enabled hosts.
# TODO modular configuration
assert config.krebs.retiolum.enable;
''
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
|
