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Commit | Line | Data |
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619e4f46 IB |
1 | { lib, pkgs, config, nodes, name, ... }: |
2 | { | |
3 | config = lib.mkIf config.myServices.mailBackup.enable { | |
4 | security.acme.certs."mail" = config.myServices.certificates.certConfig // { | |
5 | postRun = '' | |
6 | systemctl restart postfix.service | |
7 | ''; | |
8 | domain = config.hostEnv.fqdn; | |
9 | extraDomains = let | |
10 | zonesWithMx = builtins.filter (zone: | |
11 | lib.attrsets.hasAttr "withEmail" zone && lib.lists.length zone.withEmail > 0 | |
12 | ) config.myEnv.dns.masterZones; | |
13 | mxs = map (zone: "${config.myEnv.servers."${name}".mx.subdomain}.${zone.name}") zonesWithMx; | |
14 | in builtins.listToAttrs (map (mx: lib.attrsets.nameValuePair mx null) mxs); | |
15 | }; | |
16 | secrets.keys = [ | |
17 | { | |
18 | dest = "postfix/mysql_alias_maps"; | |
19 | user = config.services.postfix.user; | |
20 | group = config.services.postfix.group; | |
21 | permissions = "0440"; | |
22 | text = '' | |
23 | # We need to specify that option to trigger ssl connection | |
24 | tls_ciphers = TLSv1.2 | |
25 | user = ${config.myEnv.mail.postfix.mysql.user} | |
26 | password = ${config.myEnv.mail.postfix.mysql.password} | |
27 | hosts = ${config.myEnv.mail.postfix.mysql.remoteHost} | |
28 | dbname = ${config.myEnv.mail.postfix.mysql.database} | |
29 | query = SELECT DISTINCT 1 | |
30 | FROM forwardings_merge | |
31 | WHERE | |
32 | ((regex = 1 AND '%s' REGEXP CONCAT('^',source,'$') ) OR (regex = 0 AND source = '%s')) | |
33 | AND active = 1 | |
34 | AND '%s' NOT IN | |
35 | ( | |
36 | SELECT source | |
37 | FROM forwardings_blacklisted | |
38 | WHERE source = '%s' | |
39 | ) UNION | |
40 | SELECT 'devnull@immae.eu' | |
41 | FROM forwardings_blacklisted | |
42 | WHERE source = '%s' | |
43 | ''; | |
44 | } | |
45 | { | |
46 | dest = "postfix/mysql_mailbox_maps"; | |
47 | user = config.services.postfix.user; | |
48 | group = config.services.postfix.group; | |
49 | permissions = "0440"; | |
50 | text = '' | |
51 | # We need to specify that option to trigger ssl connection | |
52 | tls_ciphers = TLSv1.2 | |
53 | user = ${config.myEnv.mail.postfix.mysql.user} | |
54 | password = ${config.myEnv.mail.postfix.mysql.password} | |
55 | hosts = ${config.myEnv.mail.postfix.mysql.remoteHost} | |
56 | dbname = ${config.myEnv.mail.postfix.mysql.database} | |
57 | query = SELECT DISTINCT 1 | |
58 | FROM mailboxes | |
59 | WHERE active = 1 | |
60 | AND ( | |
61 | (domain = '%d' AND user = '%u' AND regex = 0) | |
62 | OR ( | |
63 | regex = 1 | |
64 | AND '%d' REGEXP CONCAT('^',domain,'$') | |
65 | AND '%u' REGEXP CONCAT('^',user,'$') | |
66 | ) | |
67 | ) | |
68 | LIMIT 1 | |
69 | ''; | |
70 | } | |
71 | { | |
72 | dest = "postfix/ldap_ejabberd_users_immae_fr"; | |
73 | user = config.services.postfix.user; | |
74 | group = config.services.postfix.group; | |
75 | permissions = "0440"; | |
76 | text = '' | |
77 | server_host = ldaps://${config.myEnv.jabber.ldap.host}:636 | |
78 | search_base = ${config.myEnv.jabber.ldap.base} | |
79 | query_filter = ${config.myEnv.jabber.postfix_user_filter} | |
80 | domain = immae.fr | |
81 | bind_dn = ${config.myEnv.jabber.ldap.dn} | |
82 | bind_pw = ${config.myEnv.jabber.ldap.password} | |
83 | result_attribute = immaeXmppUid | |
84 | result_format = ejabberd@localhost | |
85 | version = 3 | |
86 | ''; | |
87 | } | |
88 | ]; | |
89 | ||
90 | networking.firewall.allowedTCPPorts = [ 25 ]; | |
91 | ||
92 | nixpkgs.overlays = [ (self: super: { | |
93 | postfix = super.postfix.override { withMySQL = true; }; | |
94 | }) ]; | |
95 | users.users."${config.services.postfix.user}".extraGroups = [ "keys" ]; | |
96 | services.filesWatcher.postfix = { | |
97 | restart = true; | |
98 | paths = [ | |
99 | config.secrets.fullPaths."postfix/mysql_alias_maps" | |
100 | config.secrets.fullPaths."postfix/mysql_mailbox_maps" | |
101 | config.secrets.fullPaths."postfix/ldap_ejabberd_users_immae_fr" | |
102 | ]; | |
103 | }; | |
104 | services.postfix = { | |
105 | mapFiles = let | |
106 | recipient_maps = let | |
107 | name = n: i: "relay_${n}_${toString i}"; | |
108 | pair = n: i: m: lib.attrsets.nameValuePair (name n i) ( | |
109 | if m.type == "hash" | |
110 | then pkgs.writeText (name n i) m.content | |
111 | else null | |
112 | ); | |
113 | pairs = n: v: lib.imap1 (i: m: pair n i m) v.recipient_maps; | |
114 | in lib.attrsets.filterAttrs (k: v: v != null) ( | |
115 | lib.attrsets.listToAttrs (lib.flatten ( | |
116 | lib.attrsets.mapAttrsToList pairs config.myEnv.mail.postfix.backup_domains | |
117 | )) | |
118 | ); | |
119 | relay_restrictions = lib.attrsets.filterAttrs (k: v: v != null) ( | |
120 | lib.attrsets.mapAttrs' (n: v: | |
121 | lib.attrsets.nameValuePair "recipient_access_${n}" ( | |
122 | if lib.attrsets.hasAttr "relay_restrictions" v | |
123 | then pkgs.writeText "recipient_access_${n}" v.relay_restrictions | |
124 | else null | |
125 | ) | |
126 | ) config.myEnv.mail.postfix.backup_domains | |
127 | ); | |
128 | virtual_map = { | |
129 | virtual = pkgs.writeText "postfix-virtual" ( | |
130 | builtins.concatStringsSep "\n" ( | |
131 | lib.attrsets.mapAttrsToList ( | |
132 | n: v: lib.optionalString v.external '' | |
133 | script_${n}@mail.immae.eu 1 | |
134 | '' | |
135 | ) config.myEnv.mail.scripts | |
136 | ) | |
137 | ); | |
138 | }; | |
139 | sasl_access = { | |
140 | host_dummy_mailboxes = pkgs.writeText "host-virtual-mailbox" | |
141 | (builtins.concatStringsSep "\n" (lib.attrsets.mapAttrsToList (n: v: "${n}@immae.eu 1") nodes)); | |
142 | }; | |
143 | in | |
144 | recipient_maps // relay_restrictions // virtual_map // sasl_access; | |
145 | config = { | |
146 | ### postfix module overrides | |
147 | readme_directory = "${pkgs.postfix}/share/postfix/doc"; | |
148 | smtp_tls_CAfile = lib.mkForce ""; | |
149 | smtp_tls_cert_file = lib.mkForce ""; | |
150 | smtp_tls_key_file = lib.mkForce ""; | |
151 | ||
152 | message_size_limit = "1073741824"; # Don't put 0 here, it's not equivalent to "unlimited" | |
153 | mailbox_size_limit = "1073741825"; # Workaround, local delivered mails should all go through scripts | |
154 | alias_database = "\$alias_maps"; | |
155 | ||
156 | ### Relay domains | |
157 | relay_domains = let | |
158 | backups = lib.flatten (lib.attrsets.mapAttrsToList (n: v: v.domains or []) config.myEnv.mail.postfix.backup_domains); | |
159 | virtual_domains = config.myEnv.mail.postfix.additional_mailbox_domains | |
160 | ++ lib.remove "localhost.immae.eu" (lib.remove null (lib.flatten (map | |
161 | (zone: map | |
162 | (e: if e.receive | |
163 | then "${e.domain}${lib.optionalString (e.domain != "") "."}${zone.name}" | |
164 | else null | |
165 | ) | |
166 | (zone.withEmail or []) | |
167 | ) | |
168 | config.myEnv.dns.masterZones | |
169 | ))); | |
170 | in | |
171 | backups ++ virtual_domains; | |
172 | relay_recipient_maps = let | |
173 | backup_recipients = lib.flatten (lib.attrsets.mapAttrsToList (n: v: | |
174 | lib.imap1 (i: m: "${m.type}:/etc/postfix/relay_${n}_${toString i}") v.recipient_maps | |
175 | ) config.myEnv.mail.postfix.backup_domains); | |
176 | virtual_alias_maps = [ | |
177 | "hash:/etc/postfix/virtual" | |
178 | "mysql:${config.secrets.fullPaths."postfix/mysql_alias_maps"}" | |
179 | "ldap:${config.secrets.fullPaths."postfix/ldap_ejabberd_users_immae_fr"}" | |
180 | ]; | |
181 | virtual_mailbox_maps = [ | |
182 | "hash:/etc/postfix/host_dummy_mailboxes" | |
183 | "mysql:${config.secrets.fullPaths."postfix/mysql_mailbox_maps"}" | |
184 | ]; | |
185 | in | |
186 | backup_recipients ++ virtual_alias_maps ++ virtual_mailbox_maps; | |
187 | smtpd_relay_restrictions = [ | |
188 | "defer_unauth_destination" | |
189 | ] ++ lib.flatten (lib.attrsets.mapAttrsToList (n: v: | |
190 | if lib.attrsets.hasAttr "relay_restrictions" v | |
191 | then [ "check_recipient_access hash:/etc/postfix/recipient_access_${n}" ] | |
192 | else [] | |
193 | ) config.myEnv.mail.postfix.backup_domains); | |
194 | ||
195 | ### Additional smtpd configuration | |
196 | smtpd_tls_received_header = "yes"; | |
197 | smtpd_tls_loglevel = "1"; | |
198 | ||
199 | ### Email sending configuration | |
200 | smtp_tls_security_level = "may"; | |
201 | smtp_tls_loglevel = "1"; | |
202 | ||
203 | ### Force ip bind for smtp | |
204 | smtp_bind_address = config.myEnv.servers."${name}".ips.main.ip4; | |
205 | smtp_bind_address6 = builtins.head config.myEnv.servers."${name}".ips.main.ip6; | |
206 | ||
207 | smtpd_milters = [ | |
208 | "unix:${config.myServices.mail.milters.sockets.opendkim}" | |
209 | "unix:${config.myServices.mail.milters.sockets.openarc}" | |
210 | "unix:${config.myServices.mail.milters.sockets.opendmarc}" | |
211 | ]; | |
212 | }; | |
213 | enable = true; | |
214 | enableSmtp = true; | |
215 | enableSubmission = false; | |
216 | # FIXME: Mail adressed to localhost.immae.eu will still have mx-1 as | |
217 | # prioritized MX, which provokes "mail for localhost.immae.eu loops | |
218 | # back to myself" errors. This transport entry forces to push | |
219 | # e-mails to its right destination. | |
220 | transport = '' | |
221 | localhost.immae.eu smtp:[immae.eu]:25 | |
222 | ''; | |
223 | destination = ["localhost"]; | |
224 | # This needs to reverse DNS | |
225 | hostname = config.hostEnv.fqdn; | |
226 | setSendmail = false; | |
227 | sslCert = "/var/lib/acme/mail/fullchain.pem"; | |
228 | sslKey = "/var/lib/acme/mail/key.pem"; | |
229 | recipientDelimiter = "+"; | |
230 | }; | |
231 | }; | |
232 | } | |
233 |