Reddit reviews Postfix: The Definitive Guide: A Secure and Easy-to-Use MTA for UNIX
We found 1 Reddit comments about Postfix: The Definitive Guide: A Secure and Easy-to-Use MTA for UNIX. Here are the top ones, ranked by their Reddit score.
Ah, darksim, we meet again!
As far as a general guide, there's the usual O'Reilly books - Postfix, Spam Assassin, Sendmail if you're a poor SOB who has to administer a Sendmail box, Zimbra (sigh), etc.
If you're using AWS SES as a relay, they have tons of good documentation on their website.
Honestly though, 40% of what I learned was from co-workers who learned it the hard way, 58% was from googling things and maybe 2% was from a reference manual or two we had sitting around. Just implementing email infrastructure does amazing things for your knowledge of it, and figuring out what the hell is going on when your clients call you highly upset because the entire IP block they're in has been blacklisted.