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1# Configuration for `ssmtp', a trivial mail transfer agent that can
2# replace sendmail/postfix on simple systems. It delivers email
3# directly to an SMTP server defined in its configuration file, wihout
4# queueing mail locally.
5
6{ config, lib, pkgs, ... }:
7
8with lib;
9
10let
11
12 cfg = config.networking.defaultMailServer;
13
14in
15
16{
17
18 options = {
19
20 networking.defaultMailServer = {
21
22 directDelivery = mkOption {
23 type = types.bool;
24 default = false;
25 example = true;
26 description = ''
27 Use the trivial Mail Transfer Agent (MTA)
28 <command>ssmtp</command> package to allow programs to send
29 e-mail. If you don't want to run a “real” MTA like
30 <command>sendmail</command> or <command>postfix</command> on
31 your machine, set this option to <literal>true</literal>, and
32 set the option
33 <option>networking.defaultMailServer.hostName</option> to the
34 host name of your preferred mail server.
35 '';
36 };
37
38 hostName = mkOption {
39 type = types.str;
40 example = "mail.example.org";
41 description = ''
42 The host name of the default mail server to use to deliver
43 e-mail.
44 '';
45 };
46
47 root = mkOption {
48 type = types.str;
49 default = "";
50 example = "root@example.org";
51 description = ''
52 The e-mail to which mail for users with UID < 1000 is forwarded.
53 '';
54 };
55
56 domain = mkOption {
57 type = types.str;
58 default = "";
59 example = "example.org";
60 description = ''
61 The domain from which mail will appear to be sent.
62 '';
63 };
64
65 useTLS = mkOption {
66 type = types.bool;
67 default = false;
68 example = true;
69 description = ''
70 Whether TLS should be used to connect to the default mail
71 server.
72 '';
73 };
74
75 useSTARTTLS = mkOption {
76 type = types.bool;
77 default = false;
78 example = true;
79 description = ''
80 Whether the STARTTLS should be used to connect to the default
81 mail server. (This is needed for TLS-capable mail servers
82 running on the default SMTP port 25.)
83 '';
84 };
85
86 authUser = mkOption {
87 type = types.str;
88 default = "";
89 example = "foo@example.org";
90 description = ''
91 Username used for SMTP auth. Leave blank to disable.
92 '';
93 };
94
95 authPass = mkOption {
96 type = types.str;
97 default = "";
98 example = "correctHorseBatteryStaple";
99 description = ''
100 Password used for SMTP auth. (STORED PLAIN TEXT, WORLD-READABLE IN NIX STORE)
101 '';
102 };
103
104 setSendmail = mkOption {
105 type = types.bool;
106 default = true;
107 description = "Whether to set the system sendmail to ssmtp's.";
108 };
109
110 };
111
112 };
113
114
115 config = mkIf cfg.directDelivery {
116
117 environment.etc."ssmtp/ssmtp.conf".text =
118 ''
119 MailHub=${cfg.hostName}
120 FromLineOverride=YES
121 ${if cfg.root != "" then "root=${cfg.root}" else ""}
122 ${if cfg.domain != "" then "rewriteDomain=${cfg.domain}" else ""}
123 UseTLS=${if cfg.useTLS then "YES" else "NO"}
124 UseSTARTTLS=${if cfg.useSTARTTLS then "YES" else "NO"}
125 #Debug=YES
126 ${if cfg.authUser != "" then "AuthUser=${cfg.authUser}" else ""}
127 ${if cfg.authPass != "" then "AuthPass=${cfg.authPass}" else ""}
128 '';
129
130 environment.systemPackages = [pkgs.ssmtp];
131
132 services.mail.sendmailSetuidWrapper = mkIf cfg.setSendmail {
133 program = "sendmail";
134 source = "${pkgs.ssmtp}/bin/sendmail";
135 setuid = false;
136 setgid = false;
137 };
138
139 };
140
141}