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# Email server configuration
# Copyright (C) 2023 Nguyễn Gia Phong
#
# This file is part of loang configuration.
#
# Loang configuration is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Loang configuration is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with loang configuration. If not, see <https://www.gnu.org/licenses/>.
{ config, options, pkgs, ... }:
let
certDir = config.security.acme.certs.${hostname}.directory;
domain = config.networking.domain;
hostname = "tem.${domain}";
in {
networking.firewall.allowedTCPPorts = [
25 # SMTP-MTA
465 # SMTP-MSA
993 # IMAPS
];
services = {
alps = {
enable = true;
imaps.host = hostname;
theme = "alps";
};
maddy = {
config = ''
auth_map email_localpart
'' + (builtins.replaceStrings [
''
auth.pass_table local_authdb {
table sql_table {
driver sqlite3
dsn credentials.db
table_name passwords
}
}
''
"imap tcp://0.0.0.0:143"
"submission tcp://0.0.0.0:587"
] [
''
auth.shadow local_authdb {
debug yes
use_helper no
}
''
"imap tls://0.0.0.0:993"
"submission tls://0.0.0.0:465"
] options.services.maddy.config.default);
enable = true;
hostname = hostname;
primaryDomain = domain;
tls = {
loader = "file";
certificates = [{
certPath = "${certDir}/cert.pem";
keyPath = "${certDir}/key.pem";
}];
};
};
nginx.virtualHosts = {
"mta-sts.${domain}" = {
enableACME = true;
forceSSL = true;
locations."/".root = pkgs.writeTextFile {
name = "mta-sts.txt";
text = ''
version: STSv1
mode: enforce
max_age: 604800
mx: ${hostname}
'';
destination = "/.well-known/mta-sts.txt";
};
};
${domain}.locations."^~ /.well-known/openpgpkey" = {
root = with pkgs; stdenvNoCC.mkDerivation {
pname = "wkd";
version = domain;
src = ./wkd;
nativeBuildInputs = [ gnupg ];
installPhase = let
printWKDHash = "${gnupg}/libexec/gpg-wks-client --print-wkd-hash";
in ''
hu=$out/.well-known/openpgpkey/hu
mkdir -p $hu
for key in *.asc
do
mb="''${key%.asc}@${domain}"
hash=$(echo "$mb" | ${printWKDHash})
gpg --dearmor < "$key" > $hu/''${hash%" $mb"}
done
touch $out/.well-known/openpgpkey/policy
'';
};
extraConfig = ''
add_header Access-Control-Allow-Origin *;
'';
};
${hostname} = let alps = config.services.alps;
in {
enableACME = true;
forceSSL = true;
locations."/".proxyPass = "http://${alps.bindIP}:${toString alps.port}";
};
};
};
systemd.services.alps.unitConfig.Requires = "maddy.service";
users.extraUsers.maddy.extraGroups = [ "nginx" "shadow" ];
}
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