This repository has no description
machines.neoprism: replace exim-smarthost with simple-nixos-mailserver
IMAPS, SMTP submission, sieve filtering, DKIM, full-text search.
Remove dead code internet-gateway.nix and hackerfleet exim router.
Add mail and DKIM dirs to borg backup.
author
lassulus
date
(Mar 5, 2026, 10:59 PM CET)
commit
2c9b9dcc
2c9b9dccd7949ec68cf37aaa2a44cc150cd99d9b
parent
84269025
842690258467837f6857b830e6ef4f3355e17b1c
+322
-62
+105
flake.lock
+105
flake.lock
···
1
1
{
2
2
"nodes": {
3
+
"blobs": {
4
+
"flake": false,
5
+
"locked": {
6
+
"lastModified": 1604995301,
7
+
"narHash": "sha256-wcLzgLec6SGJA8fx1OEN1yV/Py5b+U5iyYpksUY/yLw=",
8
+
"owner": "simple-nixos-mailserver",
9
+
"repo": "blobs",
10
+
"rev": "2cccdf1ca48316f2cfd1c9a0017e8de5a7156265",
11
+
"type": "gitlab"
12
+
},
13
+
"original": {
14
+
"owner": "simple-nixos-mailserver",
15
+
"repo": "blobs",
16
+
"type": "gitlab"
17
+
}
18
+
},
3
19
"blueprint": {
4
20
"inputs": {
5
21
"nixpkgs": [
···
120
136
"type": "github"
121
137
}
122
138
},
139
+
"flake-compat": {
140
+
"flake": false,
141
+
"locked": {
142
+
"lastModified": 1767039857,
143
+
"narHash": "sha256-vNpUSpF5Nuw8xvDLj2KCwwksIbjua2LZCqhV1LNRDns=",
144
+
"owner": "NixOS",
145
+
"repo": "flake-compat",
146
+
"rev": "5edf11c44bc78a0d334f6334cdaf7d60d732daab",
147
+
"type": "github"
148
+
},
149
+
"original": {
150
+
"owner": "NixOS",
151
+
"repo": "flake-compat",
152
+
"type": "github"
153
+
}
154
+
},
123
155
"flake-parts": {
124
156
"inputs": {
125
157
"nixpkgs-lib": [
···
234
266
"original": {
235
267
"owner": "numtide",
236
268
"repo": "flake-utils",
269
+
"type": "github"
270
+
}
271
+
},
272
+
"git-hooks": {
273
+
"inputs": {
274
+
"flake-compat": [
275
+
"nixos-mailserver",
276
+
"flake-compat"
277
+
],
278
+
"gitignore": "gitignore",
279
+
"nixpkgs": [
280
+
"nixos-mailserver",
281
+
"nixpkgs"
282
+
]
283
+
},
284
+
"locked": {
285
+
"lastModified": 1769939035,
286
+
"narHash": "sha256-Fok2AmefgVA0+eprw2NDwqKkPGEI5wvR+twiZagBvrg=",
287
+
"owner": "cachix",
288
+
"repo": "git-hooks.nix",
289
+
"rev": "a8ca480175326551d6c4121498316261cbb5b260",
290
+
"type": "github"
291
+
},
292
+
"original": {
293
+
"owner": "cachix",
294
+
"repo": "git-hooks.nix",
295
+
"type": "github"
296
+
}
297
+
},
298
+
"gitignore": {
299
+
"inputs": {
300
+
"nixpkgs": [
301
+
"nixos-mailserver",
302
+
"git-hooks",
303
+
"nixpkgs"
304
+
]
305
+
},
306
+
"locked": {
307
+
"lastModified": 1709087332,
308
+
"narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
309
+
"owner": "hercules-ci",
310
+
"repo": "gitignore.nix",
311
+
"rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
312
+
"type": "github"
313
+
},
314
+
"original": {
315
+
"owner": "hercules-ci",
316
+
"repo": "gitignore.nix",
237
317
"type": "github"
238
318
}
239
319
},
···
453
533
"type": "github"
454
534
}
455
535
},
536
+
"nixos-mailserver": {
537
+
"inputs": {
538
+
"blobs": "blobs",
539
+
"flake-compat": "flake-compat",
540
+
"git-hooks": "git-hooks",
541
+
"nixpkgs": [
542
+
"nixpkgs"
543
+
]
544
+
},
545
+
"locked": {
546
+
"lastModified": 1772722317,
547
+
"narHash": "sha256-y47/GkUkr/aKN8oBx3wLWgpIWnTY+x2pJ2mxD1AMeEg=",
548
+
"owner": "simple-nixos-mailserver",
549
+
"repo": "nixos-mailserver",
550
+
"rev": "3938a7518aa109697983103139cb6ea99d897af5",
551
+
"type": "gitlab"
552
+
},
553
+
"original": {
554
+
"owner": "simple-nixos-mailserver",
555
+
"ref": "master",
556
+
"repo": "nixos-mailserver",
557
+
"type": "gitlab"
558
+
}
559
+
},
456
560
"nixpkgs": {
457
561
"locked": {
458
562
"lastModified": 1772433332,
···
547
651
"nix-rosetta-builder": "nix-rosetta-builder",
548
652
"nixos-facter": "nixos-facter",
549
653
"nixos-hardware": "nixos-hardware",
654
+
"nixos-mailserver": "nixos-mailserver",
550
655
"nixpkgs": "nixpkgs",
551
656
"nixvim": "nixvim",
552
657
"opencrow": "opencrow",
+3
flake.nix
+3
flake.nix
···
72
72
73
73
opencrow.url = "github:Lassulus/opencrow/tool_n_stop";
74
74
opencrow.inputs.nixpkgs.follows = "nixpkgs";
75
+
76
+
nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/master";
77
+
nixos-mailserver.inputs.nixpkgs.follows = "nixpkgs";
75
78
};
76
79
77
80
outputs =
+211
2configs/mailserver.nix
+211
2configs/mailserver.nix
···
1
+
{
2
+
self,
3
+
config,
4
+
lib,
5
+
pkgs,
6
+
...
7
+
}:
8
+
let
9
+
relayHosts = map (host: host.nets.retiolum.ip6.addr) [
10
+
config.krebs.hosts.aergia
11
+
config.krebs.hosts.ignavia
12
+
config.krebs.hosts.coaxmetal
13
+
config.krebs.hosts.green
14
+
config.krebs.hosts.mors
15
+
];
16
+
17
+
mynetworks = map (ip: "[${ip}]") relayHosts;
18
+
in
19
+
{
20
+
imports = [
21
+
self.inputs.nixos-mailserver.nixosModules.default
22
+
];
23
+
24
+
mailserver = {
25
+
enable = true;
26
+
fqdn = "mail.lassul.us";
27
+
domains = [ "lassul.us" ];
28
+
29
+
loginAccounts = {
30
+
"lass@lassul.us" = {
31
+
hashedPasswordFile =
32
+
config.clan.core.vars.generators.mailserver-lass.files."lass-mail-password-hash".path;
33
+
aliases = [
34
+
"postmaster@lassul.us"
35
+
"root@lassul.us"
36
+
"abuse@lassul.us"
37
+
"hostmaster@lassul.us"
38
+
"webmaster@lassul.us"
39
+
"security@lassul.us"
40
+
"noc@lassul.us"
41
+
"mailer-daemon@lassul.us"
42
+
"nobody@lassul.us"
43
+
"lassulus@lassul.us"
44
+
];
45
+
catchAll = [ "lassul.us" ];
46
+
sieveScript = ''
47
+
require ["fileinto", "mailbox"];
48
+
49
+
# GitHub — sort by repo from List-Id header
50
+
if header :matches "List-Id" "*.github.com" {
51
+
if header :contains "List-Id" "nixpkgs" { fileinto :create "GitHub.nixpkgs"; }
52
+
elsif header :contains "List-Id" "disko" { fileinto :create "GitHub.disko"; }
53
+
elsif header :contains "List-Id" "clan-core" { fileinto :create "GitHub.clan-core"; }
54
+
elsif header :contains "List-Id" "data-mesher" { fileinto :create "GitHub.data-mesher"; }
55
+
elsif header :contains "List-Id" "foundation" { fileinto :create "GitHub.foundation"; }
56
+
elsif header :contains "List-Id" "nix." { fileinto :create "GitHub.nix"; }
57
+
elsif header :contains "List-Id" "nixos-wiki" { fileinto :create "GitHub.nixos-wiki"; }
58
+
elsif header :contains "List-Id" "nixos-homepage" { fileinto :create "GitHub.nixos-homepage"; }
59
+
else { fileinto :create "GitHub.other"; }
60
+
stop;
61
+
}
62
+
63
+
# Gitea (clan)
64
+
if anyof (
65
+
header :matches "X-Gitea-*" "*",
66
+
address :domain "From" "clan.lol"
67
+
) {
68
+
fileinto :create "GitHub.clan";
69
+
stop;
70
+
}
71
+
72
+
# Mailing lists — sort by List-Id
73
+
if exists "List-Id" {
74
+
if header :contains "List-Id" "vorstand.c-base" { fileinto :create "Lists.c-base-vorstand"; }
75
+
elsif header :contains "List-Id" "c-base" { fileinto :create "Lists.c-base"; }
76
+
elsif header :contains "List-Id" "afra" { fileinto :create "Lists.afra"; }
77
+
elsif header :contains "List-Id" "soundlab" { fileinto :create "Lists.soundlab"; }
78
+
elsif header :contains "List-Id" "nixos" { fileinto :create "Lists.nixos"; }
79
+
elsif header :contains "List-Id" "shack" { fileinto :create "Lists.shack"; }
80
+
elsif header :contains "List-Id" "dezentrale" { fileinto :create "Lists.dezentrale"; }
81
+
elsif header :contains "List-Id" "dn42" { fileinto :create "Lists.dn42"; }
82
+
elsif header :contains "List-Id" "tinc" { fileinto :create "Lists.tinc"; }
83
+
elsif header :contains "List-Id" "wireguard" { fileinto :create "Lists.wireguard"; }
84
+
elsif header :contains "List-Id" "retiolum" { fileinto :create "Lists.retiolum"; }
85
+
else { fileinto :create "Lists.other"; }
86
+
stop;
87
+
}
88
+
89
+
# Billing/receipts
90
+
if anyof (
91
+
address :domain "From" "paypal.de",
92
+
address :domain "From" "paypal.com",
93
+
address :domain "From" "steuerberaten.de",
94
+
address :domain "From" "patreon.com",
95
+
address :domain "From" "dhl.de",
96
+
address :domain "From" "eloop.app",
97
+
header :contains "Subject" "Rechnung",
98
+
header :contains "Subject" "Invoice",
99
+
header :contains "Subject" "receipt"
100
+
) {
101
+
fileinto :create "Billing";
102
+
stop;
103
+
}
104
+
105
+
# Newsletters (has unsubscribe but no List-Id)
106
+
if allof (
107
+
header :contains "List-Unsubscribe" "http",
108
+
not exists "List-Id"
109
+
) {
110
+
fileinto :create "Newsletters";
111
+
stop;
112
+
}
113
+
114
+
# Everything else -> INBOX
115
+
keep;
116
+
'';
117
+
};
118
+
"bot@lassul.us" = {
119
+
hashedPasswordFile =
120
+
config.clan.core.vars.generators.mailserver-bot.files."bot-mail-password-hash".path;
121
+
};
122
+
};
123
+
124
+
# TLS via existing ACME cert
125
+
x509.useACMEHost = "mail.lassul.us";
126
+
127
+
# DKIM — auto-managed by module
128
+
dkimSigning = true;
129
+
dkimSelector = "mail";
130
+
131
+
# Full-text search for IMAP clients
132
+
fullTextSearch = {
133
+
enable = true;
134
+
memoryLimit = 500;
135
+
};
136
+
137
+
stateVersion = 3;
138
+
};
139
+
140
+
# Password generation for mail accounts
141
+
clan.core.vars.generators.mailserver-lass = {
142
+
files."lass-mail-password" = { };
143
+
files."lass-mail-password-hash" = { };
144
+
runtimeInputs = with pkgs; [
145
+
coreutils
146
+
mkpasswd
147
+
pwgen
148
+
];
149
+
script = ''
150
+
pwgen -s 32 1 > "$out/lass-mail-password"
151
+
mkpasswd -sm bcrypt < "$out/lass-mail-password" > "$out/lass-mail-password-hash"
152
+
'';
153
+
};
154
+
155
+
clan.core.vars.generators.mailserver-bot = {
156
+
files."bot-mail-password" = { };
157
+
files."bot-mail-password-hash" = { };
158
+
runtimeInputs = with pkgs; [
159
+
coreutils
160
+
mkpasswd
161
+
pwgen
162
+
];
163
+
script = ''
164
+
pwgen -s 32 1 > "$out/bot-mail-password"
165
+
mkpasswd -sm bcrypt < "$out/bot-mail-password" > "$out/bot-mail-password-hash"
166
+
'';
167
+
};
168
+
169
+
# Retiolum relay: allow krebs hosts to relay through postfix
170
+
services.postfix.settings.main.mynetworks = lib.mkForce (
171
+
[
172
+
"127.0.0.0/8"
173
+
"[::1]/128"
174
+
]
175
+
++ mynetworks
176
+
);
177
+
178
+
# ACME cert — reuse existing setup
179
+
security.acme.certs."mail.lassul.us" = {
180
+
group = "lasscert";
181
+
webroot = "/var/lib/acme/acme-challenge";
182
+
};
183
+
users.groups.lasscert.members = [
184
+
"dovecot2"
185
+
"postfix"
186
+
"nginx"
187
+
];
188
+
189
+
# Firewall rules (krebs.iptables pattern, INPUT policy is DROP)
190
+
krebs.iptables.tables.filter.INPUT.rules = [
191
+
{
192
+
predicate = "-p tcp --dport smtp";
193
+
target = "ACCEPT";
194
+
}
195
+
{
196
+
predicate = "-p tcp --dport submissions";
197
+
target = "ACCEPT";
198
+
}
199
+
{
200
+
predicate = "-p tcp --dport submission";
201
+
target = "ACCEPT";
202
+
}
203
+
{
204
+
predicate = "-p tcp --dport imaps";
205
+
target = "ACCEPT";
206
+
}
207
+
];
208
+
209
+
# msmtp for local submission via SSH
210
+
environment.systemPackages = [ pkgs.msmtp ];
211
+
}
-8
2configs/riot.nix
-8
2configs/riot.nix
-53
2configs/mail/internet-gateway.nix
-53
2configs/mail/internet-gateway.nix
···
1
-
{ config, pkgs, ... }:
2
-
{
3
-
networking.firewall.allowedTCPPorts = [ 25 ];
4
-
5
-
security.acme.certs."mail.lassul.us" = {
6
-
group = "lasscert";
7
-
webroot = "/var/lib/acme/acme-challenge";
8
-
};
9
-
users.groups.lasscert.members = [
10
-
"exim"
11
-
"nginx"
12
-
];
13
-
14
-
clan.core.vars.generators.lassul-us-dkim = {
15
-
files."lassul.us.dkim.priv" = { };
16
-
files."lassul.us.dkim.pub" = { };
17
-
migrateFact = "lassul.us-dkim";
18
-
runtimeInputs = with pkgs; [
19
-
coreutils
20
-
openssl
21
-
];
22
-
script = ''
23
-
openssl genrsa -out "$out"/lassul.us.dkim.priv 2048
24
-
openssl rsa -in "$out"/lassul.us.dkim.priv -pubout -outform der 2>/dev/null | openssl base64 -A > "$out"/lassul.us.dkim.pub
25
-
'';
26
-
};
27
-
28
-
krebs.exim-smarthost = {
29
-
enable = true;
30
-
primary_hostname = "lassul.us";
31
-
dkim = [
32
-
{
33
-
domain = "lassul.us";
34
-
private_key = config.clan.core.vars.generators.lassul-us-dkim.files."lassul.us.dkim.priv".path;
35
-
}
36
-
];
37
-
ssl_cert = "/var/lib/acme/mail.lassul.us/fullchain.pem";
38
-
ssl_key = "/var/lib/acme/mail.lassul.us/key.pem";
39
-
sender_domains = [ "lassul.us" ];
40
-
local_domains = [
41
-
"localhost"
42
-
"lassul.us"
43
-
];
44
-
extraRouters = ''
45
-
forward_lassul_us:
46
-
driver = manualroute
47
-
domains = lassul.us
48
-
transport = remote_smtp
49
-
route_list = * green.r
50
-
no_more
51
-
'';
52
-
};
53
-
}
+2
machines/neoprism/backup.nix
+2
machines/neoprism/backup.nix
+1
-1
machines/neoprism/config.nix
+1
-1
machines/neoprism/config.nix