[jcynix]

While I don't have an OpenBSD system to check that man page, I doubt that it is sufficient to set up a proper mail server.

You may find one of the printed books on Postfix helpful. No Starch Press has a decent one, which, regardless of its age, still is a good one.

Make sure that your server cannot be used as an open relay to deliver spam. Take a look at http://www.postfix.org/SMTPD_ACCESS_README.html to learn how to do that. Postfix is a well written piece of software and (IMHO) rather easy to maintain once you understood the basic principles. I've been using it for more than a decade now.

[Shared404]

Many thanks. I'll take a look at that book, I haven't gone wrong with No Starch Press yet.

Edit: For anyone else who is looking and can't find it on NSP's website, I found it with 'filetype:pdf The Book of Postfix' on duckduckgo.