Not OP, but hosting my own mail as well (postfix, dovecot, spamassassin) for six seven now. Had one issue with outgoing mails to Microsoft (hotmail I think) bou

Not OP, but hosting my own mail as well (postfix, dovecot, spamassassin) for six seven now. Had one issue with outgoing mails to Microsoft (hotmail I think) bouncing. The IP of my dedicated server had been blacklisted from before it was used by me, but I got them to remove it. No other issues I can think of. I'm getting about 1-2 spam mails a month delivered to my inbox, usually french SEO spam. Not worth investigating.