misc_nixos-mailserver/mail-server/postfix.nix

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# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2017 Robin Raymond
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#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ mail_dir, domain, valiases }:
let
# valiasToString :: { from = "..."; to = "..." } -> String
valiasToString = x: "${x.from}@${domain} ${x.to}@${domain}\n";
# valiases_postfix :: [ String ]
valiases_postfix = map valiasToString valiases;
# concatString :: [ String ] -> String
concatString = l: if l == []
then ""
else (builtins.head l) + (concatString (builtins.tail l));
# valiases_file :: Path
valiases_file = builtins.toFile "valias" (concatString valiases_postfix);
# vhosts_file :: Path
vhosts_file = builtins.toFile "vhosts" domain;
in
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{
enable = true;
networksStyle = "host";
mapFiles."valias" = valiases_file;
# mapFiles."vaccounts" = vaccounts_file;
# sslCert = "/etc/nixos/cert/${cert_file}";
# sslKey = "/etc/nixos/cert/${key_file}";
extraConfig =
''
# Extra Config
smtpd_banner = $myhostname ESMTP NO UCE
smtpd_tls_auth_only = yes
disable_vrfy_command = yes
message_size_limit = 20971520
milter_rcpt_macros = i {rcpt_addr}
# virtual mail system
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_mailbox_base = ${mail_dir}
virtual_mailbox_domains = ${vhosts_file}
virtual_alias_maps = hash:/var/lib/postfix/conf/valias
virtual_transport = lmtp:unix:private/dovecot-lmtp
# sasl with dovecot
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
'';
extraMasterConf =
''
# Extra Config
#submission inet n - n - - smtpd
# -o smtpd_tls_security_level=encrypt
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_sasl_type=dovecot
# -o smtpd_sasl_path=private/auth
# -o smtpd_sasl_security_options=noanonymous
# -o smtpd_sasl_local_domain=$myhostname
# -o smtpd_client_restrictions=permit_sasl_authenticated,reject
# -o smtpd_sender_login_maps=hash:/etc/postfix/virtual
# -o smtpd_sender_restrictions=reject_sender_login_mismatch
# -o smtpd_recipient_restrictions=reject_non_fqdn_recipient,reject_unknown_recipient_domain,permit_sasl_authenticated,reject
'';
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}