I’ve been self hosting email successfully for 20 years. My goto article for this question:
poolp.org/…/you-should-not-run-your-mail-server-b…
TLDR;
TL;DR: - Mail is not hard: people keep repeating that because they read it, not because they tried it - Big Mailer Corps are quite happy with that myth, it keeps their userbase growing - Big Mailer Corps control a large percentage of the e-mail address space which is good for none of us - It's ok that people have their e-mails hosted at Big Mailer Corps as long as there's enough people outside too EDIT (2019-12-15) # A practical guide to set up a mail exchanger was published on this blog.
“Abuse”
Mae was warned that one of her managers was “a ‘fixer’ who goes after employees that were seen as stirring the pot.”
So basically doing their “managing job” in the best interest of the company.