My mail server runs all mails for 20+ domains. Not a lot of traffic, though. And no mailing lists newsletters. Really just mostly my private e-mail. I also don't get a lot of SPAM, surprisingly, even though I have no spam filter set up ATM.
@mnw I'll post some blog entries on my setup of postfix/dovecot with DKIM, DMARC, SPF, multi-domain, mail-crypt in the next few days. If you're used to some Linux and config stuff, it should work.
Mail has a *lot* of moving parts, and doing one tiny thing wrong might breach security and/or get you blacklisted forever. So it really pays off to piggyback off communities who automated all those best practices into a single script or setup.
Contrary to most other self hosted tools, mail is the pivot point of all your online security. So must be solid
Mastodon instance for people with Wildeboer as their last name