nullmailer on Arch Linux
I’ve been a fan of nullmailer for some years now, so much so that I took ownership of the nullmailer package for Arch Linux.
> nullmailer is a sendmail/qmail/etc replacement MTA for hosts which > relay to a fixed set of smart relays. It is designed to be simple to > configure, secure, and easily extendable.
The other advantage nullmailer
has compared to similar tools is that is queues
email until it is able to deliver it upstream.
Install nullmailer
as follows.
packer -S --noedit --noconfirm nullmailer
Configuring nullmailer
to relay via Gmail can be achieved using
SMTPS or
MSA. nullmailer
has
had these capabilies since 1.10. The following provides some useful clues
/usr/lib/nullmailer/smtp --help
.
While these examples are specific to relaying via Gmail, you can sse it is trivial to adapt them to any other mail host.
Relay via Gmail using MSA
Add to following to /etc/nullmailer/remotes
. I prefer this technique.
smtp.gmail.com smtp --port=587 --auth-login [email protected] --pass=Yourpassword --starttls
Relay via Gmail using SMTPS
Add to following to /etc/nullmailer/remotes
.
smtp.gmail.com smtp --port=465 --auth-login [email protected] --pass=Yourpassword --ssl
Once you’ve got /etc/nullmailer/remotes
configured start the nullmailer service.
sudo systemctl start nullmailer
To test nullmailer
can relay email correctly do the following.
echo "Test 1" | mailx -s "Test One" [email protected]
You can see what nullmailer
is up to by checking the systemd journal or syslog
(if you’ve syslog enabled systemd). This is how to get the logs from the systemd journal.
journalctl _SYSTEMD_UNIT=nullmailer.service
Or via syslog.
sudo grep nullmailer /var/log/daemon.log
When you’re happy nullmailer
is working enable the systemd unit.
sudo systemctl enable nullmailer
Email will now flow as required.
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