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-rw-r--r--modules/private/mail/postfix.nix488
1 files changed, 245 insertions, 243 deletions
diff --git a/modules/private/mail/postfix.nix b/modules/private/mail/postfix.nix
index edfd196..9fdc7bd 100644
--- a/modules/private/mail/postfix.nix
+++ b/modules/private/mail/postfix.nix
@@ -1,267 +1,269 @@
1{ lib, pkgs, config, myconfig, ... }: 1{ lib, pkgs, config, myconfig, ... }:
2{ 2{
3 config.services.backup.profiles.mail.excludeFile = '' 3 config = lib.mkIf config.myServices.mail.enable {
4 + /var/lib/postfix 4 services.backup.profiles.mail.excludeFile = ''
5 ''; 5 + /var/lib/postfix
6 config.secrets.keys = [ 6 '';
7 { 7 secrets.keys = [
8 dest = "postfix/mysql_alias_maps"; 8 {
9 user = config.services.postfix.user; 9 dest = "postfix/mysql_alias_maps";
10 group = config.services.postfix.group; 10 user = config.services.postfix.user;
11 permissions = "0440"; 11 group = config.services.postfix.group;
12 text = '' 12 permissions = "0440";
13 # We need to specify that option to trigger ssl connection 13 text = ''
14 tls_ciphers = TLSv1.2 14 # We need to specify that option to trigger ssl connection
15 user = ${myconfig.env.mail.postfix.mysql.user} 15 tls_ciphers = TLSv1.2
16 password = ${myconfig.env.mail.postfix.mysql.password} 16 user = ${myconfig.env.mail.postfix.mysql.user}
17 hosts = unix:${myconfig.env.mail.postfix.mysql.socket} 17 password = ${myconfig.env.mail.postfix.mysql.password}
18 dbname = ${myconfig.env.mail.postfix.mysql.database} 18 hosts = unix:${myconfig.env.mail.postfix.mysql.socket}
19 query = SELECT DISTINCT destination 19 dbname = ${myconfig.env.mail.postfix.mysql.database}
20 FROM forwardings_merge 20 query = SELECT DISTINCT destination
21 WHERE 21 FROM forwardings_merge
22 ((regex = 1 AND '%s' REGEXP CONCAT('^',source,'$') ) OR (regex = 0 AND source = '%s')) 22 WHERE
23 AND active = 1 23 ((regex = 1 AND '%s' REGEXP CONCAT('^',source,'$') ) OR (regex = 0 AND source = '%s'))
24 AND '%s' NOT IN 24 AND active = 1
25 ( 25 AND '%s' NOT IN
26 SELECT source 26 (
27 SELECT source
28 FROM forwardings_blacklisted
29 WHERE source = '%s'
30 ) UNION
31 SELECT 'devnull@immae.eu'
27 FROM forwardings_blacklisted 32 FROM forwardings_blacklisted
28 WHERE source = '%s' 33 WHERE source = '%s'
29 ) UNION 34 '';
30 SELECT 'devnull@immae.eu' 35 }
31 FROM forwardings_blacklisted 36 {
32 WHERE source = '%s' 37 dest = "postfix/mysql_mailbox_maps";
33 ''; 38 user = config.services.postfix.user;
34 } 39 group = config.services.postfix.group;
35 { 40 permissions = "0440";
36 dest = "postfix/mysql_mailbox_maps"; 41 text = ''
37 user = config.services.postfix.user; 42 # We need to specify that option to trigger ssl connection
38 group = config.services.postfix.group; 43 tls_ciphers = TLSv1.2
39 permissions = "0440"; 44 user = ${myconfig.env.mail.postfix.mysql.user}
40 text = '' 45 password = ${myconfig.env.mail.postfix.mysql.password}
41 # We need to specify that option to trigger ssl connection 46 hosts = unix:${myconfig.env.mail.postfix.mysql.socket}
42 tls_ciphers = TLSv1.2 47 dbname = ${myconfig.env.mail.postfix.mysql.database}
43 user = ${myconfig.env.mail.postfix.mysql.user} 48 result_format = /%d/%u
44 password = ${myconfig.env.mail.postfix.mysql.password} 49 query = SELECT DISTINCT '%s'
45 hosts = unix:${myconfig.env.mail.postfix.mysql.socket} 50 FROM mailboxes
46 dbname = ${myconfig.env.mail.postfix.mysql.database} 51 WHERE active = 1
47 result_format = /%d/%u 52 AND (
48 query = SELECT DISTINCT '%s' 53 (domain = '%d' AND user = '%u' AND regex = 0)
49 FROM mailboxes 54 OR (
50 WHERE active = 1 55 regex = 1
51 AND ( 56 AND '%d' REGEXP CONCAT('^',domain,'$')
52 (domain = '%d' AND user = '%u' AND regex = 0) 57 AND '%u' REGEXP CONCAT('^',user,'$')
53 OR ( 58 )
54 regex = 1
55 AND '%d' REGEXP CONCAT('^',domain,'$')
56 AND '%u' REGEXP CONCAT('^',user,'$')
57 ) 59 )
58 ) 60 LIMIT 1
59 LIMIT 1
60 '';
61 }
62 {
63 dest = "postfix/mysql_sender_login_maps";
64 user = config.services.postfix.user;
65 group = config.services.postfix.group;
66 permissions = "0440";
67 text = ''
68 # We need to specify that option to trigger ssl connection
69 tls_ciphers = TLSv1.2
70 user = ${myconfig.env.mail.postfix.mysql.user}
71 password = ${myconfig.env.mail.postfix.mysql.password}
72 hosts = unix:${myconfig.env.mail.postfix.mysql.socket}
73 dbname = ${myconfig.env.mail.postfix.mysql.database}
74 query = SELECT DISTINCT destination
75 FROM forwardings_merge
76 WHERE
77 ((regex = 1 AND '%s' REGEXP CONCAT('^',source,'$') ) OR (regex = 0 AND source = '%s'))
78 AND active = 1
79 UNION SELECT '%s' AS destination
80 ''; 61 '';
81 } 62 }
82 ]; 63 {
64 dest = "postfix/mysql_sender_login_maps";
65 user = config.services.postfix.user;
66 group = config.services.postfix.group;
67 permissions = "0440";
68 text = ''
69 # We need to specify that option to trigger ssl connection
70 tls_ciphers = TLSv1.2
71 user = ${myconfig.env.mail.postfix.mysql.user}
72 password = ${myconfig.env.mail.postfix.mysql.password}
73 hosts = unix:${myconfig.env.mail.postfix.mysql.socket}
74 dbname = ${myconfig.env.mail.postfix.mysql.database}
75 query = SELECT DISTINCT destination
76 FROM forwardings_merge
77 WHERE
78 ((regex = 1 AND '%s' REGEXP CONCAT('^',source,'$') ) OR (regex = 0 AND source = '%s'))
79 AND active = 1
80 UNION SELECT '%s' AS destination
81 '';
82 }
83 ];
83 84
84 config.networking.firewall.allowedTCPPorts = [ 25 465 587 ]; 85 networking.firewall.allowedTCPPorts = [ 25 465 587 ];
85 86
86 config.nixpkgs.overlays = [ (self: super: { 87 nixpkgs.overlays = [ (self: super: {
87 postfix = super.postfix.override { withMySQL = true; }; 88 postfix = super.postfix.override { withMySQL = true; };
88 }) ]; 89 }) ];
89 config.users.users."${config.services.postfix.user}".extraGroups = [ "keys" ]; 90 users.users."${config.services.postfix.user}".extraGroups = [ "keys" ];
90 config.services.filesWatcher.postfix = { 91 services.filesWatcher.postfix = {
91 restart = true; 92 restart = true;
92 paths = [ 93 paths = [
93 config.secrets.fullPaths."postfix/mysql_alias_maps" 94 config.secrets.fullPaths."postfix/mysql_alias_maps"
94 config.secrets.fullPaths."postfix/mysql_mailbox_maps" 95 config.secrets.fullPaths."postfix/mysql_mailbox_maps"
95 config.secrets.fullPaths."postfix/mysql_sender_login_maps" 96 config.secrets.fullPaths."postfix/mysql_sender_login_maps"
96 ]; 97 ];
97 }; 98 };
98 config.services.postfix = { 99 services.postfix = {
99 mapFiles = let 100 mapFiles = let
100 recipient_maps = let 101 recipient_maps = let
101 name = n: i: "relay_${n}_${toString i}"; 102 name = n: i: "relay_${n}_${toString i}";
102 pair = n: i: m: lib.attrsets.nameValuePair (name n i) ( 103 pair = n: i: m: lib.attrsets.nameValuePair (name n i) (
103 if m.type == "hash" 104 if m.type == "hash"
104 then pkgs.writeText (name n i) m.content 105 then pkgs.writeText (name n i) m.content
105 else null
106 );
107 pairs = n: v: lib.imap1 (i: m: pair n i m) v.recipient_maps;
108 in lib.attrsets.filterAttrs (k: v: v != null) (
109 lib.attrsets.listToAttrs (lib.flatten (
110 lib.attrsets.mapAttrsToList pairs myconfig.env.mail.postfix.backup_domains
111 ))
112 );
113 relay_restrictions = lib.attrsets.filterAttrs (k: v: v != null) (
114 lib.attrsets.mapAttrs' (n: v:
115 lib.attrsets.nameValuePair "recipient_access_${n}" (
116 if lib.attrsets.hasAttr "relay_restrictions" v
117 then pkgs.writeText "recipient_access_${n}" v.relay_restrictions
118 else null 106 else null
119 ) 107 );
120 ) myconfig.env.mail.postfix.backup_domains 108 pairs = n: v: lib.imap1 (i: m: pair n i m) v.recipient_maps;
121 ); 109 in lib.attrsets.filterAttrs (k: v: v != null) (
122 in 110 lib.attrsets.listToAttrs (lib.flatten (
123 recipient_maps // relay_restrictions; 111 lib.attrsets.mapAttrsToList pairs myconfig.env.mail.postfix.backup_domains
124 config = { 112 ))
125 ### postfix module overrides 113 );
126 readme_directory = "${pkgs.postfix}/share/postfix/doc"; 114 relay_restrictions = lib.attrsets.filterAttrs (k: v: v != null) (
127 smtp_tls_CAfile = lib.mkForce ""; 115 lib.attrsets.mapAttrs' (n: v:
128 smtp_tls_cert_file = lib.mkForce ""; 116 lib.attrsets.nameValuePair "recipient_access_${n}" (
129 smtp_tls_key_file = lib.mkForce ""; 117 if lib.attrsets.hasAttr "relay_restrictions" v
118 then pkgs.writeText "recipient_access_${n}" v.relay_restrictions
119 else null
120 )
121 ) myconfig.env.mail.postfix.backup_domains
122 );
123 in
124 recipient_maps // relay_restrictions;
125 config = {
126 ### postfix module overrides
127 readme_directory = "${pkgs.postfix}/share/postfix/doc";
128 smtp_tls_CAfile = lib.mkForce "";
129 smtp_tls_cert_file = lib.mkForce "";
130 smtp_tls_key_file = lib.mkForce "";
130 131
131 message_size_limit = "1073741824"; # Don't put 0 here, it's not equivalent to "unlimited" 132 message_size_limit = "1073741824"; # Don't put 0 here, it's not equivalent to "unlimited"
132 alias_database = "\$alias_maps"; 133 alias_database = "\$alias_maps";
133 134
134 ### Virtual mailboxes config 135 ### Virtual mailboxes config
135 virtual_alias_maps = "mysql:${config.secrets.fullPaths."postfix/mysql_alias_maps"}"; 136 virtual_alias_maps = "mysql:${config.secrets.fullPaths."postfix/mysql_alias_maps"}";
136 virtual_mailbox_domains = myconfig.env.mail.postfix.additional_mailbox_domains 137 virtual_mailbox_domains = myconfig.env.mail.postfix.additional_mailbox_domains
137 ++ lib.remove "localhost.immae.eu" (lib.remove null (lib.flatten (map 138 ++ lib.remove "localhost.immae.eu" (lib.remove null (lib.flatten (map
138 (zone: map 139 (zone: map
139 (e: if e.receive 140 (e: if e.receive
140 then "${e.domain}${lib.optionalString (e.domain != "") "."}${zone.name}" 141 then "${e.domain}${lib.optionalString (e.domain != "") "."}${zone.name}"
141 else null 142 else null
143 )
144 (zone.withEmail or [])
142 ) 145 )
143 (zone.withEmail or []) 146 myconfig.env.dns.masterZones
144 ) 147 )));
145 myconfig.env.dns.masterZones 148 virtual_mailbox_maps = "mysql:${config.secrets.fullPaths."postfix/mysql_mailbox_maps"}";
146 ))); 149 dovecot_destination_recipient_limit = "1";
147 virtual_mailbox_maps = "mysql:${config.secrets.fullPaths."postfix/mysql_mailbox_maps"}"; 150 virtual_transport = "dovecot";
148 dovecot_destination_recipient_limit = "1";
149 virtual_transport = "dovecot";
150 151
151 ### Relay domains 152 ### Relay domains
152 relay_domains = lib.flatten (lib.attrsets.mapAttrsToList (n: v: v.domains or []) myconfig.env.mail.postfix.backup_domains); 153 relay_domains = lib.flatten (lib.attrsets.mapAttrsToList (n: v: v.domains or []) myconfig.env.mail.postfix.backup_domains);
153 relay_recipient_maps = lib.flatten (lib.attrsets.mapAttrsToList (n: v: 154 relay_recipient_maps = lib.flatten (lib.attrsets.mapAttrsToList (n: v:
154 lib.imap1 (i: m: "${m.type}:/etc/postfix/relay_${n}_${toString i}") v.recipient_maps 155 lib.imap1 (i: m: "${m.type}:/etc/postfix/relay_${n}_${toString i}") v.recipient_maps
155 ) myconfig.env.mail.postfix.backup_domains); 156 ) myconfig.env.mail.postfix.backup_domains);
156 smtpd_relay_restrictions = [ 157 smtpd_relay_restrictions = [
157 "permit_mynetworks" 158 "permit_mynetworks"
158 "permit_sasl_authenticated" 159 "permit_sasl_authenticated"
159 "defer_unauth_destination" 160 "defer_unauth_destination"
160 ] ++ lib.flatten (lib.attrsets.mapAttrsToList (n: v: 161 ] ++ lib.flatten (lib.attrsets.mapAttrsToList (n: v:
161 if lib.attrsets.hasAttr "relay_restrictions" v 162 if lib.attrsets.hasAttr "relay_restrictions" v
162 then [ "check_recipient_access hash:/etc/postfix/recipient_access_${n}" ] 163 then [ "check_recipient_access hash:/etc/postfix/recipient_access_${n}" ]
163 else [] 164 else []
164 ) myconfig.env.mail.postfix.backup_domains); 165 ) myconfig.env.mail.postfix.backup_domains);
165 166
166 ### Additional smtpd configuration 167 ### Additional smtpd configuration
167 smtpd_tls_received_header = "yes"; 168 smtpd_tls_received_header = "yes";
168 smtpd_tls_loglevel = "1"; 169 smtpd_tls_loglevel = "1";
169 170
170 ### Email sending configuration 171 ### Email sending configuration
171 smtp_tls_security_level = "may"; 172 smtp_tls_security_level = "may";
172 smtp_tls_loglevel = "1"; 173 smtp_tls_loglevel = "1";
173 174
174 ### Force ip bind for smtp 175 ### Force ip bind for smtp
175 smtp_bind_address = myconfig.env.servers.eldiron.ips.main.ip4; 176 smtp_bind_address = myconfig.env.servers.eldiron.ips.main.ip4;
176 smtp_bind_address6 = builtins.head myconfig.env.servers.eldiron.ips.main.ip6; 177 smtp_bind_address6 = builtins.head myconfig.env.servers.eldiron.ips.main.ip6;
177 178
178 # #Unneeded if postfix can only send e-mail from "self" domains 179 # #Unneeded if postfix can only send e-mail from "self" domains
179 # #smtp_sasl_auth_enable = "yes"; 180 # #smtp_sasl_auth_enable = "yes";
180 # #smtp_sasl_password_maps = "hash:/etc/postfix/relay_creds"; 181 # #smtp_sasl_password_maps = "hash:/etc/postfix/relay_creds";
181 # #smtp_sasl_security_options = "noanonymous"; 182 # #smtp_sasl_security_options = "noanonymous";
182 # #smtp_sender_dependent_authentication = "yes"; 183 # #smtp_sender_dependent_authentication = "yes";
183 # #sender_dependent_relayhost_maps = "hash:/etc/postfix/sender_relay"; 184 # #sender_dependent_relayhost_maps = "hash:/etc/postfix/sender_relay";
184 185
185 ### opendkim, opendmarc, openarc milters 186 ### opendkim, opendmarc, openarc milters
186 non_smtpd_milters = [ 187 non_smtpd_milters = [
187 "unix:${config.myServices.mail.milters.sockets.opendkim}" 188 "unix:${config.myServices.mail.milters.sockets.opendkim}"
188 "unix:${config.myServices.mail.milters.sockets.opendmarc}" 189 "unix:${config.myServices.mail.milters.sockets.opendmarc}"
189 "unix:${config.myServices.mail.milters.sockets.openarc}" 190 "unix:${config.myServices.mail.milters.sockets.openarc}"
190 ]; 191 ];
191 smtpd_milters = [ 192 smtpd_milters = [
192 "unix:${config.myServices.mail.milters.sockets.opendkim}" 193 "unix:${config.myServices.mail.milters.sockets.opendkim}"
193 "unix:${config.myServices.mail.milters.sockets.opendmarc}" 194 "unix:${config.myServices.mail.milters.sockets.opendmarc}"
194 "unix:${config.myServices.mail.milters.sockets.openarc}" 195 "unix:${config.myServices.mail.milters.sockets.openarc}"
195 ];
196 };
197 enable = true;
198 enableSmtp = true;
199 enableSubmission = true;
200 submissionOptions = {
201 smtpd_tls_security_level = "encrypt";
202 smtpd_sasl_auth_enable = "yes";
203 smtpd_tls_auth_only = "yes";
204 smtpd_sasl_tls_security_options = "noanonymous";
205 smtpd_sasl_type = "dovecot";
206 smtpd_sasl_path = "private/auth";
207 smtpd_reject_unlisted_recipient = "no";
208 smtpd_client_restrictions = "permit_sasl_authenticated,reject";
209 # Refuse to send e-mails with a From that is not handled
210 smtpd_sender_restrictions =
211 "reject_sender_login_mismatch,reject_unlisted_sender,permit_sasl_authenticated,reject";
212 smtpd_sender_login_maps = "mysql:${config.secrets.fullPaths."postfix/mysql_sender_login_maps"}";
213 smtpd_recipient_restrictions = "permit_sasl_authenticated,reject";
214 milter_macro_daemon_name = "ORIGINATING";
215 smtpd_milters = "unix:${config.myServices.mail.milters.sockets.opendkim}";
216 };
217 # FIXME: Mail adressed to localhost.immae.eu will still have mx-1 as
218 # prioritized MX, which provokes "mail for localhost.immae.eu loops
219 # back to myself" errors. This transport entry forces to push
220 # e-mails to its right destination.
221 transport = ''
222 localhost.immae.eu smtp:[immae.eu]:25
223 '';
224 destination = ["localhost"];
225 # This needs to reverse DNS
226 hostname = "eldiron.immae.eu";
227 setSendmail = true;
228 sslCert = "/var/lib/acme/mail/fullchain.pem";
229 sslKey = "/var/lib/acme/mail/key.pem";
230 recipientDelimiter = "+";
231 masterConfig = {
232 submissions = {
233 type = "inet";
234 private = false;
235 command = "smtpd";
236 args = ["-o" "smtpd_tls_wrappermode=yes" ] ++ (let
237 mkKeyVal = opt: val: [ "-o" (opt + "=" + val) ];
238 in lib.concatLists (lib.mapAttrsToList mkKeyVal config.services.postfix.submissionOptions)
239 );
240 };
241 dovecot = {
242 type = "unix";
243 privileged = true;
244 chroot = false;
245 command = "pipe";
246 args = let
247 # rspamd could be used as a milter, but then it cannot apply
248 # its checks "per user" (milter is not yet dispatched to
249 # users), so we wrap dovecot-lda inside rspamc per recipient
250 # here.
251 dovecot_exe = "${pkgs.dovecot}/libexec/dovecot/dovecot-lda -f \${sender} -a \${original_recipient} -d \${user}@\${nexthop}";
252 in [
253 "flags=DRhu" "user=vhost:vhost"
254 "argv=${pkgs.rspamd}/bin/rspamc -h ${config.myServices.mail.rspamd.sockets.worker-controller} -c bayes -d \${user}@\${nexthop} --mime --exec {${dovecot_exe}}"
255 ]; 196 ];
256 }; 197 };
198 enable = true;
199 enableSmtp = true;
200 enableSubmission = true;
201 submissionOptions = {
202 smtpd_tls_security_level = "encrypt";
203 smtpd_sasl_auth_enable = "yes";
204 smtpd_tls_auth_only = "yes";
205 smtpd_sasl_tls_security_options = "noanonymous";
206 smtpd_sasl_type = "dovecot";
207 smtpd_sasl_path = "private/auth";
208 smtpd_reject_unlisted_recipient = "no";
209 smtpd_client_restrictions = "permit_sasl_authenticated,reject";
210 # Refuse to send e-mails with a From that is not handled
211 smtpd_sender_restrictions =
212 "reject_sender_login_mismatch,reject_unlisted_sender,permit_sasl_authenticated,reject";
213 smtpd_sender_login_maps = "mysql:${config.secrets.fullPaths."postfix/mysql_sender_login_maps"}";
214 smtpd_recipient_restrictions = "permit_sasl_authenticated,reject";
215 milter_macro_daemon_name = "ORIGINATING";
216 smtpd_milters = "unix:${config.myServices.mail.milters.sockets.opendkim}";
217 };
218 # FIXME: Mail adressed to localhost.immae.eu will still have mx-1 as
219 # prioritized MX, which provokes "mail for localhost.immae.eu loops
220 # back to myself" errors. This transport entry forces to push
221 # e-mails to its right destination.
222 transport = ''
223 localhost.immae.eu smtp:[immae.eu]:25
224 '';
225 destination = ["localhost"];
226 # This needs to reverse DNS
227 hostname = "eldiron.immae.eu";
228 setSendmail = true;
229 sslCert = "/var/lib/acme/mail/fullchain.pem";
230 sslKey = "/var/lib/acme/mail/key.pem";
231 recipientDelimiter = "+";
232 masterConfig = {
233 submissions = {
234 type = "inet";
235 private = false;
236 command = "smtpd";
237 args = ["-o" "smtpd_tls_wrappermode=yes" ] ++ (let
238 mkKeyVal = opt: val: [ "-o" (opt + "=" + val) ];
239 in lib.concatLists (lib.mapAttrsToList mkKeyVal config.services.postfix.submissionOptions)
240 );
241 };
242 dovecot = {
243 type = "unix";
244 privileged = true;
245 chroot = false;
246 command = "pipe";
247 args = let
248 # rspamd could be used as a milter, but then it cannot apply
249 # its checks "per user" (milter is not yet dispatched to
250 # users), so we wrap dovecot-lda inside rspamc per recipient
251 # here.
252 dovecot_exe = "${pkgs.dovecot}/libexec/dovecot/dovecot-lda -f \${sender} -a \${original_recipient} -d \${user}@\${nexthop}";
253 in [
254 "flags=DRhu" "user=vhost:vhost"
255 "argv=${pkgs.rspamd}/bin/rspamc -h ${config.myServices.mail.rspamd.sockets.worker-controller} -c bayes -d \${user}@\${nexthop} --mime --exec {${dovecot_exe}}"
256 ];
257 };
258 };
257 }; 259 };
258 }; 260 security.acme.certs."mail" = {
259 config.security.acme.certs."mail" = { 261 postRun = ''
260 postRun = '' 262 systemctl restart postfix.service
261 systemctl restart postfix.service 263 '';
262 ''; 264 extraDomains = {
263 extraDomains = { 265 "smtp.immae.eu" = null;
264 "smtp.immae.eu" = null; 266 };
265 }; 267 };
266 }; 268 };
267} 269}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-23 10:54:11 +0000