misc_nixos-mailserver/mail-server/postfix.nix
Robin Raymond b68e64ec72 certificate scheme 2
On the fly create certificates via openssl (Maybe change this to
libressl in the future?). This is probably the best scheme to get
something that simply works. Self signed certificates only pose a
problem when connecting to retrieve the email via imap or pop3.
2017-08-13 11:51:07 +02:00

88 lines
2.9 KiB
Nix

# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2017 Robin Raymond
#
# 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, cert, key }:
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
{
enable = true;
networksStyle = "host";
mapFiles."valias" = valiases_file;
# mapFiles."vaccounts" = vaccounts_file;
sslCert = cert;
sslKey = key;
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
'';
}