mirror of
https://gitlab.com/simple-nixos-mailserver/nixos-mailserver.git
synced 2024-12-27 07:26:22 +01:00
506 lines
19 KiB
Nix
506 lines
19 KiB
Nix
# nixos-mailserver: a simple mail server
|
|
# Copyright (C) 2016-2018 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/>
|
|
|
|
{ pkgs ? import <nixpkgs> {}, ...}:
|
|
|
|
pkgs.nixosTest {
|
|
name = "external";
|
|
nodes = {
|
|
server = { config, pkgs, ... }:
|
|
{
|
|
imports = [
|
|
../default.nix
|
|
./lib/config.nix
|
|
];
|
|
|
|
virtualisation.memorySize = 1024;
|
|
|
|
services.rsyslogd = {
|
|
enable = true;
|
|
defaultConfig = ''
|
|
*.* /dev/console
|
|
'';
|
|
};
|
|
|
|
|
|
mailserver = {
|
|
enable = true;
|
|
debug = true;
|
|
fqdn = "mail.example.com";
|
|
domains = [ "example.com" "example2.com" ];
|
|
rewriteMessageId = true;
|
|
dkimKeyBits = 1535;
|
|
|
|
loginAccounts = {
|
|
"user1@example.com" = {
|
|
hashedPassword = "$6$/z4n8AQl6K$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/";
|
|
aliases = [ "postmaster@example.com" ];
|
|
catchAll = [ "example.com" ];
|
|
};
|
|
"user2@example.com" = {
|
|
hashedPassword = "$6$u61JrAtuI0a$nGEEfTP5.eefxoScUGVG/Tl0alqla2aGax4oTd85v3j3xSmhv/02gNfSemv/aaMinlv9j/ZABosVKBrRvN5Qv0";
|
|
aliases = [ "chuck@example.com" ];
|
|
};
|
|
"user@example2.com" = {
|
|
hashedPassword = "$6$u61JrAtuI0a$nGEEfTP5.eefxoScUGVG/Tl0alqla2aGax4oTd85v3j3xSmhv/02gNfSemv/aaMinlv9j/ZABosVKBrRvN5Qv0";
|
|
};
|
|
"lowquota@example.com" = {
|
|
hashedPassword = "$6$u61JrAtuI0a$nGEEfTP5.eefxoScUGVG/Tl0alqla2aGax4oTd85v3j3xSmhv/02gNfSemv/aaMinlv9j/ZABosVKBrRvN5Qv0";
|
|
quota = "1B";
|
|
};
|
|
};
|
|
|
|
extraVirtualAliases = {
|
|
"single-alias@example.com" = "user1@example.com";
|
|
"multi-alias@example.com" = [ "user1@example.com" "user2@example.com" ];
|
|
};
|
|
|
|
enableImap = true;
|
|
enableImapSsl = true;
|
|
fullTextSearch = {
|
|
enable = true;
|
|
autoIndex = true;
|
|
# special use depends on https://github.com/NixOS/nixpkgs/pull/93201
|
|
autoIndexExclude = [ (if (pkgs.lib.versionAtLeast pkgs.lib.version "21") then "\\Junk" else "Junk") ];
|
|
enforced = "yes";
|
|
# fts-xapian warns when memory is low, which makes the test fail
|
|
memoryLimit = 100000;
|
|
};
|
|
};
|
|
};
|
|
client = { nodes, config, pkgs, ... }: let
|
|
serverIP = nodes.server.config.networking.primaryIPAddress;
|
|
clientIP = nodes.client.config.networking.primaryIPAddress;
|
|
grep-ip = pkgs.writeScriptBin "grep-ip" ''
|
|
#!${pkgs.stdenv.shell}
|
|
echo grep '${clientIP}' "$@" >&2
|
|
exec grep '${clientIP}' "$@"
|
|
'';
|
|
check-mail-id = pkgs.writeScriptBin "check-mail-id" ''
|
|
#!${pkgs.stdenv.shell}
|
|
echo grep '^Message-ID:.*@mail.example.com>$' "$@" >&2
|
|
exec grep '^Message-ID:.*@mail.example.com>$' "$@"
|
|
'';
|
|
test-imap-spam = pkgs.writeScriptBin "imap-mark-spam" ''
|
|
#!${pkgs.python3.interpreter}
|
|
import imaplib
|
|
|
|
with imaplib.IMAP4_SSL('${serverIP}') as imap:
|
|
imap.login('user1@example.com', 'user1')
|
|
imap.select()
|
|
status, [response] = imap.search(None, 'ALL')
|
|
msg_ids = response.decode("utf-8").split(' ')
|
|
print(msg_ids)
|
|
assert status == 'OK'
|
|
assert len(msg_ids) == 1
|
|
|
|
imap.copy(','.join(msg_ids), 'Junk')
|
|
for num in msg_ids:
|
|
imap.store(num, '+FLAGS', '\\Deleted')
|
|
imap.expunge()
|
|
|
|
imap.select('Junk')
|
|
status, [response] = imap.search(None, 'ALL')
|
|
msg_ids = response.decode("utf-8").split(' ')
|
|
print(msg_ids)
|
|
assert status == 'OK'
|
|
assert len(msg_ids) == 1
|
|
|
|
imap.close()
|
|
'';
|
|
test-imap-ham = pkgs.writeScriptBin "imap-mark-ham" ''
|
|
#!${pkgs.python3.interpreter}
|
|
import imaplib
|
|
|
|
with imaplib.IMAP4_SSL('${serverIP}') as imap:
|
|
imap.login('user1@example.com', 'user1')
|
|
imap.select('Junk')
|
|
status, [response] = imap.search(None, 'ALL')
|
|
msg_ids = response.decode("utf-8").split(' ')
|
|
print(msg_ids)
|
|
assert status == 'OK'
|
|
assert len(msg_ids) == 1
|
|
|
|
imap.copy(','.join(msg_ids), 'INBOX')
|
|
for num in msg_ids:
|
|
imap.store(num, '+FLAGS', '\\Deleted')
|
|
imap.expunge()
|
|
|
|
imap.select('INBOX')
|
|
status, [response] = imap.search(None, 'ALL')
|
|
msg_ids = response.decode("utf-8").split(' ')
|
|
print(msg_ids)
|
|
assert status == 'OK'
|
|
assert len(msg_ids) == 1
|
|
|
|
imap.close()
|
|
'';
|
|
search = pkgs.writeScriptBin "search" ''
|
|
#!${pkgs.python3.interpreter}
|
|
import imaplib
|
|
import sys
|
|
|
|
[_, mailbox, needle] = sys.argv
|
|
|
|
with imaplib.IMAP4_SSL('${serverIP}') as imap:
|
|
imap.login('user1@example.com', 'user1')
|
|
imap.select(mailbox)
|
|
status, [response] = imap.search(None, 'BODY', repr(needle))
|
|
msg_ids = [ i for i in response.decode("utf-8").split(' ') if i ]
|
|
print(msg_ids)
|
|
assert status == 'OK'
|
|
assert len(msg_ids) == 1
|
|
status, response = imap.fetch(msg_ids[0], '(RFC822)')
|
|
assert status == "OK"
|
|
assert needle in repr(response)
|
|
imap.close()
|
|
'';
|
|
in {
|
|
imports = [
|
|
./lib/config.nix
|
|
];
|
|
environment.systemPackages = with pkgs; [
|
|
fetchmail msmtp procmail findutils grep-ip check-mail-id test-imap-spam test-imap-ham search
|
|
];
|
|
environment.etc = {
|
|
"root/.fetchmailrc" = {
|
|
text = ''
|
|
poll ${serverIP} with proto IMAP
|
|
user 'user1@example.com' there with password 'user1' is 'root' here
|
|
mda procmail
|
|
'';
|
|
mode = "0700";
|
|
};
|
|
"root/.fetchmailRcLowQuota" = {
|
|
text = ''
|
|
poll ${serverIP} with proto IMAP
|
|
user 'lowquota@example.com' there with password 'user2' is 'root' here
|
|
mda procmail
|
|
'';
|
|
mode = "0700";
|
|
};
|
|
"root/.procmailrc" = {
|
|
text = "DEFAULT=$HOME/mail";
|
|
};
|
|
"root/.msmtprc" = {
|
|
text = ''
|
|
account test
|
|
host ${serverIP}
|
|
port 587
|
|
from user2@example.com
|
|
user user2@example.com
|
|
password user2
|
|
|
|
account test2
|
|
host ${serverIP}
|
|
port 587
|
|
from user@example2.com
|
|
user user@example2.com
|
|
password user2
|
|
|
|
account test3
|
|
host ${serverIP}
|
|
port 587
|
|
from chuck@example.com
|
|
user user2@example.com
|
|
password user2
|
|
|
|
account test4
|
|
host ${serverIP}
|
|
port 587
|
|
from postmaster@example.com
|
|
user user1@example.com
|
|
password user1
|
|
|
|
account test5
|
|
host ${serverIP}
|
|
port 587
|
|
from single-alias@example.com
|
|
user user1@example.com
|
|
password user1
|
|
'';
|
|
};
|
|
"root/email1".text = ''
|
|
Message-ID: <12345qwerty@host.local.network>
|
|
From: User2 <user2@example.com>
|
|
To: User1 <user1@example.com>
|
|
Cc:
|
|
Bcc:
|
|
Subject: This is a test Email from user2 to user1
|
|
Reply-To:
|
|
|
|
Hello User1,
|
|
|
|
how are you doing today?
|
|
'';
|
|
"root/email2".text = ''
|
|
Message-ID: <232323abc@host.local.network>
|
|
From: User <user@example2.com>
|
|
To: User1 <user1@example.com>
|
|
Cc:
|
|
Bcc:
|
|
Subject: This is a test Email from user@example2.com to user1
|
|
Reply-To:
|
|
|
|
Hello User1,
|
|
|
|
how are you doing today?
|
|
|
|
XOXO User1
|
|
'';
|
|
"root/email3".text = ''
|
|
Message-ID: <asdfghjkl42@host.local.network>
|
|
From: Postmaster <postmaster@example.com>
|
|
To: Chuck <chuck@example.com>
|
|
Cc:
|
|
Bcc:
|
|
Subject: This is a test Email from postmaster\@example.com to chuck
|
|
Reply-To:
|
|
|
|
Hello Chuck,
|
|
|
|
I think I may have misconfigured the mail server
|
|
XOXO Postmaster
|
|
'';
|
|
"root/email4".text = ''
|
|
Message-ID: <sdfsdf@host.local.network>
|
|
From: Single Alias <single-alias@example.com>
|
|
To: User1 <user1@example.com>
|
|
Cc:
|
|
Bcc:
|
|
Subject: This is a test Email from single-alias\@example.com to user1
|
|
Reply-To:
|
|
|
|
Hello User1,
|
|
|
|
how are you doing today?
|
|
|
|
XOXO User1 aka Single Alias
|
|
'';
|
|
"root/email5".text = ''
|
|
Message-ID: <789asdf@host.local.network>
|
|
From: User2 <user2@example.com>
|
|
To: Multi Alias <multi-alias@example.com>
|
|
Cc:
|
|
Bcc:
|
|
Subject: This is a test Email from user2\@example.com to multi-alias
|
|
Reply-To:
|
|
|
|
Hello Multi Alias,
|
|
|
|
how are we doing today?
|
|
|
|
XOXO User1
|
|
'';
|
|
"root/email6".text = ''
|
|
Message-ID: <123457qwerty@host.local.network>
|
|
From: User2 <user2@example.com>
|
|
To: User1 <user1@example.com>
|
|
Cc:
|
|
Bcc:
|
|
Subject: This is a test Email from user2 to user1
|
|
Reply-To:
|
|
|
|
Hello User1,
|
|
|
|
this email contains the needle:
|
|
576a4565b70f5a4c1a0925cabdb587a6
|
|
'';
|
|
"root/email7".text = ''
|
|
Message-ID: <1234578qwerty@host.local.network>
|
|
From: User2 <user2@example.com>
|
|
To: User1 <user1@example.com>
|
|
Cc:
|
|
Bcc:
|
|
Subject: This is a test Email from user2 to user1
|
|
Reply-To:
|
|
|
|
Hello User1,
|
|
|
|
this email does not contain the needle :(
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
|
|
testScript = { nodes, ... }:
|
|
''
|
|
start_all()
|
|
|
|
server.wait_for_unit("multi-user.target")
|
|
client.wait_for_unit("multi-user.target")
|
|
|
|
# TODO put this blocking into the systemd units?
|
|
server.wait_until_succeeds(
|
|
"set +e; timeout 1 ${nodes.server.pkgs.netcat}/bin/nc -U /run/rspamd/rspamd-milter.sock < /dev/null; [ $? -eq 124 ]"
|
|
)
|
|
|
|
client.execute("cp -p /etc/root/.* ~/")
|
|
client.succeed("mkdir -p ~/mail")
|
|
client.succeed("ls -la ~/ >&2")
|
|
client.succeed("cat ~/.fetchmailrc >&2")
|
|
client.succeed("cat ~/.procmailrc >&2")
|
|
client.succeed("cat ~/.msmtprc >&2")
|
|
|
|
with subtest("imap retrieving mail"):
|
|
# fetchmail returns EXIT_CODE 1 when no new mail
|
|
client.succeed("fetchmail --nosslcertck -v || [ $? -eq 1 ] >&2")
|
|
|
|
with subtest("submission port send mail"):
|
|
# send email from user2 to user1
|
|
client.succeed(
|
|
"msmtp -a test --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email1 >&2"
|
|
)
|
|
# give the mail server some time to process the mail
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
|
|
with subtest("imap retrieving mail 2"):
|
|
client.execute("rm ~/mail/*")
|
|
# fetchmail returns EXIT_CODE 0 when it retrieves mail
|
|
client.succeed("fetchmail --nosslcertck -v >&2")
|
|
|
|
with subtest("remove sensitive information on submission port"):
|
|
client.succeed("cat ~/mail/* >&2")
|
|
## make sure our IP is _not_ in the email header
|
|
client.fail("grep-ip ~/mail/*")
|
|
client.succeed("check-mail-id ~/mail/*")
|
|
|
|
with subtest("have correct fqdn as sender"):
|
|
client.succeed("grep 'Received: from mail.example.com' ~/mail/*")
|
|
|
|
with subtest("dkim has user-specified size"):
|
|
server.succeed(
|
|
"openssl rsa -in /var/dkim/example.com.mail.key -text -noout | grep 'Private-Key: (1535 bit'"
|
|
)
|
|
|
|
with subtest("dkim singing, multiple domains"):
|
|
client.execute("rm ~/mail/*")
|
|
# send email from user2 to user1
|
|
client.succeed(
|
|
"msmtp -a test2 --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email2 >&2"
|
|
)
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
# fetchmail returns EXIT_CODE 0 when it retrieves mail
|
|
client.succeed("fetchmail --nosslcertck -v")
|
|
client.succeed("cat ~/mail/* >&2")
|
|
# make sure it is dkim signed
|
|
client.succeed("grep DKIM ~/mail/*")
|
|
|
|
with subtest("aliases"):
|
|
client.execute("rm ~/mail/*")
|
|
# send email from chuck to postmaster
|
|
client.succeed(
|
|
"msmtp -a test3 --tls=on --tls-certcheck=off --auth=on postmaster\@example.com < /etc/root/email2 >&2"
|
|
)
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
# fetchmail returns EXIT_CODE 0 when it retrieves mail
|
|
client.succeed("fetchmail --nosslcertck -v")
|
|
|
|
with subtest("catchAlls"):
|
|
client.execute("rm ~/mail/*")
|
|
# send email from chuck to non exsitent account
|
|
client.succeed(
|
|
"msmtp -a test3 --tls=on --tls-certcheck=off --auth=on lol\@example.com < /etc/root/email2 >&2"
|
|
)
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
# fetchmail returns EXIT_CODE 0 when it retrieves mail
|
|
client.succeed("fetchmail --nosslcertck -v")
|
|
|
|
client.execute("rm ~/mail/*")
|
|
# send email from user1 to chuck
|
|
client.succeed(
|
|
"msmtp -a test4 --tls=on --tls-certcheck=off --auth=on chuck\@example.com < /etc/root/email2 >&2"
|
|
)
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
# fetchmail returns EXIT_CODE 1 when no new mail
|
|
# if this succeeds, it means that user1 recieved the mail that was intended for chuck.
|
|
client.fail("fetchmail --nosslcertck -v")
|
|
|
|
with subtest("extraVirtualAliases"):
|
|
client.execute("rm ~/mail/*")
|
|
# send email from single-alias to user1
|
|
client.succeed(
|
|
"msmtp -a test5 --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email4 >&2"
|
|
)
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
# fetchmail returns EXIT_CODE 0 when it retrieves mail
|
|
client.succeed("fetchmail --nosslcertck -v")
|
|
|
|
client.execute("rm ~/mail/*")
|
|
# send email from user1 to multi-alias (user{1,2}@example.com)
|
|
client.succeed(
|
|
"msmtp -a test --tls=on --tls-certcheck=off --auth=on multi-alias\@example.com < /etc/root/email5 >&2"
|
|
)
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
# fetchmail returns EXIT_CODE 0 when it retrieves mail
|
|
client.succeed("fetchmail --nosslcertck -v")
|
|
|
|
with subtest("quota"):
|
|
client.execute("rm ~/mail/*")
|
|
client.execute("mv ~/.fetchmailRcLowQuota ~/.fetchmailrc")
|
|
|
|
client.succeed(
|
|
"msmtp -a test3 --tls=on --tls-certcheck=off --auth=on lowquota\@example.com < /etc/root/email2 >&2"
|
|
)
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
# fetchmail returns EXIT_CODE 0 when it retrieves mail
|
|
client.fail("fetchmail --nosslcertck -v")
|
|
|
|
with subtest("imap sieve junk trainer"):
|
|
# send email from user2 to user1
|
|
client.succeed(
|
|
"msmtp -a test --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email1 >&2"
|
|
)
|
|
# give the mail server some time to process the mail
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
|
|
client.succeed("imap-mark-spam >&2")
|
|
server.wait_until_succeeds("journalctl -u dovecot2 | grep -i sa-learn-spam.sh >&2")
|
|
client.succeed("imap-mark-ham >&2")
|
|
server.wait_until_succeeds("journalctl -u dovecot2 | grep -i sa-learn-ham.sh >&2")
|
|
|
|
with subtest("full text search and indexation"):
|
|
# send 2 email from user2 to user1
|
|
client.succeed(
|
|
"msmtp -a test --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email6 >&2"
|
|
)
|
|
client.succeed(
|
|
"msmtp -a test --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email7 >&2"
|
|
)
|
|
# give the mail server some time to process the mail
|
|
server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
|
|
|
|
# should find exactly one email containing this
|
|
client.succeed("search INBOX 576a4565b70f5a4c1a0925cabdb587a6 >&2")
|
|
# should fail because this folder is not indexed
|
|
client.fail("search Junk a >&2")
|
|
# check that search really goes through the indexer
|
|
server.succeed(
|
|
"journalctl -u dovecot2 | grep -E 'indexer-worker.* Mailbox INBOX: Mailbox opened because: indexing' >&2"
|
|
)
|
|
# check that Junk is not indexed
|
|
server.fail("journalctl -u dovecot2 | grep 'indexer-worker' | grep -i 'JUNK' >&2")
|
|
|
|
with subtest("no warnings or errors"):
|
|
server.fail("journalctl -u postfix | grep -i error >&2")
|
|
server.fail("journalctl -u postfix | grep -i warning >&2")
|
|
server.fail("journalctl -u dovecot2 | grep -i error >&2")
|
|
# harmless ? https://dovecot.org/pipermail/dovecot/2020-August/119575.html
|
|
server.fail(
|
|
"journalctl -u dovecot2 |grep -v 'Expunged message reappeared, giving a new UID'| grep -i warning >&2"
|
|
)
|
|
'';
|
|
}
|