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-rw-r--r--hosts/sif/email/default.nix110
-rw-r--r--hosts/sif/email/relay.crt11
-rw-r--r--hosts/sif/email/relay.key19
-rw-r--r--hosts/sif/email/secrets.yaml30
4 files changed, 170 insertions, 0 deletions
diff --git a/hosts/sif/email/default.nix b/hosts/sif/email/default.nix
new file mode 100644
index 00000000..4eda236e
--- /dev/null
+++ b/hosts/sif/email/default.nix
@@ -0,0 +1,110 @@
1{ config, lib, pkgs, ... }:
2{
3 services.postfix = {
4 enable = true;
5 enableSmtp = false;
6 enableSubmission = false;
7 setSendmail = true;
8 networksStyle = "host";
9 hostname = "sif.midgard.yggdrasil";
10 destination = [];
11 recipientDelimiter = "+";
12 config = {
13 mydomain = "yggdrasil.li";
14
15 local_transport = "error:5.1.1 No local delivery";
16 alias_database = [];
17 alias_maps = [];
18 local_recipient_maps = [];
19
20 inet_interfaces = "loopback-only";
21
22 message_size_limit = "0";
23
24 authorized_submit_users = "inline:{ gkleen= }";
25 authorized_flush_users = "inline:{ gkleen= }";
26 authorized_mailq_users = "inline:{ gkleen= }";
27
28 smtp_generic_maps = "inline:{ root=root+sif }";
29
30 mynetworks = ["127.0.0.0/8" "[::1]/128"];
31 smtpd_client_restrictions = ["permit_mynetworks" "reject"];
32 smtpd_relay_restrictions = ["permit_mynetworks" "reject"];
33
34 sender_dependent_default_transport_maps = ''regexp:${pkgs.writeText "sender_relay" ''
35 /@(cip|stud)\.ifi\.(lmu|uni-muenchen)\.de$/ smtp:smtp.ifi.lmu.de
36 /@ifi\.(lmu|uni-muenchen)\.de$/ smtp:smtpin1.ifi.lmu.de:587
37 /@math(ematik)?\.(lmu|uni-muenchen)\.de$/ smtps:smtp.math.lmu.de:465
38 /@(campus\.)?lmu\.de$/ smtp:postout.lrz.de
39 ''}'';
40 sender_bcc_maps = ''regexp:${pkgs.writeText "sender_bcc" ''
41 /^uni2work(-[^@]*)?@ifi\.lmu\.de$/ uni2work@ifi.lmu.de
42 /@ifi\.lmu\.de$/ gregor.kleen@ifi.lmu.de
43 ''}'';
44 relayhost = "[surtr.yggdrasil.li]:465";
45 default_transport = "relay";
46
47 smtp_sasl_auth_enable = true;
48 smtp_sender_dependent_authentication = true;
49 smtp_sasl_tls_security_options = "noanonymous";
50 smtp_sasl_mechanism_filter = ["plain"];
51 smtp_sasl_password_maps = "regexp:/run/credentials/postfix.service/sasl_passwd";
52 smtp_cname_overrides_servername = false;
53 smtp_always_send_ehlo = true;
54 smtp_tls_security_level = "dane";
55
56 smtp_tls_loglevel = "1";
57 smtp_dns_support_level = "dnssec";
58 };
59 masterConfig = {
60 submission = {
61 type = "inet";
62 private = false;
63 command = "smtpd";
64 args = [
65 "-o" "syslog_name=postfix/$service_name"
66 ];
67 };
68 smtp = { };
69 smtps = {
70 type = "unix";
71 private = true;
72 privileged = true;
73 chroot = false;
74 command = "smtp";
75 args = [
76 "-o" "smtp_tls_wrappermode=yes"
77 "-o" "smtp_tls_security_level=encrypt"
78 ];
79 };
80 relay = {
81 command = "smtp";
82 args = [
83 "-o" "smtp_fallback_relay="
84 "-o" "smtp_tls_security_level=verify"
85 "-o" "smtp_tls_wrappermode=yes"
86 "-o" "smtp_tls_cert_file=${./relay.crt}"
87 "-o" "smtp_tls_key_file=/run/credentials/postfix.service/relay.key"
88 ];
89 };
90 };
91 };
92
93 systemd.services.postfix = {
94 serviceConfig.LoadCredential = [
95 "sasl_passwd:${config.sops.secrets."postfix-sasl-passwd".path}"
96 "relay.key:${config.sops.secrets."relay-key".path}"
97 ];
98 };
99
100 sops.secrets = {
101 postfix-sasl-passwd = {
102 key = "sasl-passwd";
103 sopsFile = ./secrets.yaml;
104 };
105 relay-key = {
106 format = "binary";
107 sopsFile = ./relay.key;
108 };
109 };
110}
diff --git a/hosts/sif/email/relay.crt b/hosts/sif/email/relay.crt
new file mode 100644
index 00000000..ac13e7cb
--- /dev/null
+++ b/hosts/sif/email/relay.crt
@@ -0,0 +1,11 @@
1-----BEGIN CERTIFICATE-----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11-----END CERTIFICATE-----
diff --git a/hosts/sif/email/relay.key b/hosts/sif/email/relay.key
new file mode 100644
index 00000000..412a44e0
--- /dev/null
+++ b/hosts/sif/email/relay.key
@@ -0,0 +1,19 @@
1{
2 "data": "ENC[AES256_GCM,data:lBlTuzOS75pvRmcTKT4KhHMH44RlE2SvCFAUP+GfsXws1Uai7DZ1MmbhvxxCa+pcLW19+sQYxrXLRNZWby1yOeKBJ2UQeYV5LOk9LSL/WIE3FZkCo5Dv0O0gSFKjjb61WN22a4JnHbLWADf/mLT3GZv91XfvFDo=,iv:ho8wQH3UNzX9JPW5gVcUGtxZzdVwsMFus0Z4KYe5t48=,tag:dAgZyHOva2xVVhE1nTl+lg==,type:str]",
3 "sops": {
4 "age": [
5 {
6 "recipient": "age1rmmhetcmllq0ahl5qznlr0eya2zdxwl9h6y5wnl97d2wtyx5t99sm2u866",
7 "enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB6eTVRSUdFNUZGZmcxSUlT\nWmlsOGNyWXIzMGNTZjlKbXlhcEdZUXFRVkR3Cll0T0RMd0h2UW16QkR3SHlhYmNZ\nNDFrYXh3Rkp5NWsvcWc3UFJJaHVwT1UKLS0tIHhXVEI0VHBZVkpDQ1FzWENjMmJH\nb1FQWXVUUTBiZ1pKWG00MTNqVEo2SjAKK3VOU+QgRuxWYWEcrJiVMRFCprBICz4F\ngD+9zuPUzPezyJkYwTs+M+wX5GYkXppqm5W58yQLS2UDD38sr+SRjg==\n-----END AGE ENCRYPTED FILE-----\n"
8 },
9 {
10 "recipient": "age1fj65apkhfkrwyv5tx6zcs9nkjg8267fy733qph30sc7zfn7vapjqkd5kne",
11 "enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBzWmJmZDVFazN2bDY1TkNG\nNXpJN2twMFFjZUxMTVdSNzJwQTFiYktrcGdrCjk4eFVHTko0bFVMSlFFWm9tbjMr\nbWNHMEQ1Rm1qUVhodlB1RGw2aDc4TUEKLS0tIERBK0J5NkN4OXJEZ1ZOZXhNc1Jm\naWNnUmZGbTIxdmNkYi9TZ2h2bGs3MVEKPQGaEf7M/5/xvSOfawpIp50fB3QfFSuz\nPgkrPMneaBeUx+uBYMyEFX4rpzLIBR3pnYMjAfoc+bjWaOtGQuEqyQ==\n-----END AGE ENCRYPTED FILE-----\n"
12 }
13 ],
14 "lastmodified": "2025-04-25T12:14:44Z",
15 "mac": "ENC[AES256_GCM,data:pObl2bJA93az9E3Ya+hA3ekI8TKKZ9NNTi0KzmWZBOiQwi9FuQYtpnmmT80L1KXWyOKJV6wGdAri3mNe/ue2S0TziSbQ/4+Dj4ubFKgkH7thb5q2dFyxw5FzhYzRQiXFqD/pxcNN9uL0lQI2Al0Eci0zX8Kcd1rAQ6RzLEoSmco=,iv:zo/3QFKTUEDxLy1k5yyU7Z1JMZ7cKdYUc6GHjaTTZKQ=,tag:f63Eja3lBfwJCYAOyEt56g==,type:str]",
16 "unencrypted_suffix": "_unencrypted",
17 "version": "3.10.2"
18 }
19}
diff --git a/hosts/sif/email/secrets.yaml b/hosts/sif/email/secrets.yaml
new file mode 100644
index 00000000..3c74b710
--- /dev/null
+++ b/hosts/sif/email/secrets.yaml
@@ -0,0 +1,30 @@
1sasl-passwd: ENC[AES256_GCM,data:L5QOQTEOplm9rQ+PuyDUl492ZTgIgZdRXNCNRaPQ4FLU+ha0GO7rjYWAOtvW7/oVdALrkQveSpBolnLG0nayvkjLpPuA6o9brR6bky52QmhOd8cYN9LMOhJcLJTwpUuvDesXkJD1mWA+ifuPnK6elVEfPuOndzMyw8MEvbPl53yCKQ7HOJc2nGvneD5QFkiHB9W9MmrR1gjGqaCSjZ0ahCnxe/Z2SwqccmBR9l60vt683RXMYbKNLDuSgE7HcXbzF9NstfnoSq7b332y/NgYsXvY0w+f6yPhsDuPhUXU+7gIcPb4+1TFOtdZP8uIPm1aLqG2nNKNhMGt23X8dD5Myy0FF6XmbTj43mDzKJahNel7pT91d+Vac5s08UeyUpQSjtrVMYneVTYbHEwiFPAD7S57LF0kZuE1aXIRF35g6XV3GB4rQDsrBsrZzn9vsGS12L2pdtYFVCvt/dLFlmd/GjPpm4JWyNSg,iv:fUEBrr1iby7+hK8ZesW+77HLMW93c6LpCcoJy8pgXUE=,tag:cW8vKVAebnJqo1gNNwDohQ==,type:str]
2sops:
3 kms: []
4 gcp_kms: []
5 azure_kv: []
6 hc_vault: []
7 age:
8 - recipient: age1rmmhetcmllq0ahl5qznlr0eya2zdxwl9h6y5wnl97d2wtyx5t99sm2u866
9 enc: |
10 -----BEGIN AGE ENCRYPTED FILE-----
11 YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA1MVYrR1ZrUXVhYVIvdTdS
12 OUxoOGhRZ3p2dFhCYkxta1REYy9FWTFEZVNJCjhpQ0VMcWdkWWQ1blZyVVpGWk81
13 UVBTZzNKSis2ZVVNdFA4TldvL05oMWcKLS0tIEl0TU8xQUhkTk83dDhzYU5aeCtR
14 OVcrdFRaeGxZL2kxT3VzUnBtWEI1Y1UK8LwKTus25P/nQrMJG5MOuR/lD2PCgeLC
15 WYBIbFusX//mwr1nymyWnHXkfXf8uHzpc6rJGFoa+TuOVU3elYB/Pg==
16 -----END AGE ENCRYPTED FILE-----
17 - recipient: age1fj65apkhfkrwyv5tx6zcs9nkjg8267fy733qph30sc7zfn7vapjqkd5kne
18 enc: |
19 -----BEGIN AGE ENCRYPTED FILE-----
20 YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBQcUs2OGp6WWN5cm9IVDdx
21 TFRpZTJXQjBXeGp3RytPaFdjR3UyVURnYmhZCnh3SDNYR0J1US9vcEhTbmJCNm5r
22 emJReml2QTNkTC93M0lpYlpNbTc4TGsKLS0tIGZ4YkE4STQ2dmh4akJVcnZOUVhT
23 MTNrOGxqZmFWSnl0U3lVTnllbEFTN28KKv/W6tk2YlNQV8fotfjSLg1HOs6OdMj4
24 GkZ30jQYfwmFYEA8YPn9JXbVNpprXd0d6ufLl/tAQckT6lsqGhwzeg==
25 -----END AGE ENCRYPTED FILE-----
26 lastmodified: "2022-02-02T14:45:23Z"
27 mac: ENC[AES256_GCM,data:UdM/VmdfqhYm1aFCHaO0mbJA/oyV/J2oKVVmGDa0Co3MWq9aWMqP726O+rLk36W0HOG4fmue//R1Q524au2hMW9bZUFzrubfQt2V78tZRZeHCJSRmOmi1D1EDdfPz9J3oWDvIEgIIsAk5H5EuuH0j6FILye6tzcomNGDAKZbwuc=,iv:a7dJAqkcroLp01gkGKV5gm6gTIIMa/9P8qJn44ISrw0=,tag:R9/6X6mgfVSLK7bmoWRnfQ==,type:str]
28 pgp: []
29 unencrypted_suffix: _unencrypted
30 version: 3.7.1