[jcynix]

> My biggest hesitance to self hosting email specifically is dealing with spam. What does that look like these days and do you have any pointers to share?

Postfix can easily be configured to reject incoming emails from senders without a reverse DNS mapping for their IP address, which makes it reject a lot of spam.

For spammers with reverse mapping greylisting still works fine, they almost never retry.

Certain commercial spammers (hello China :-0) use software which can be filtered with a just one rule matching their sending software, which is "nice" enough to display its name in their mail headers.

And last but not least spamassassin / rspamd work fine to filter whatever comes through.

In the end I get less than 10 spam emails per week. And these go into a separate mailbox filtered by good old procmail, based on spamassassin's ratings. I check the spam inbox maybe once a week for false positives and more often than not the box is empty.

[jesterson]

> Postfix can easily be configured to reject incoming emails from senders without a reverse DNS mapping for their IP address, which makes it reject a lot of spam

Historically some corporate domains ignore that rule (yea, in 2025!), so I would advise not to reject any email and run everything through spam analysis daemon. This way you won't lose any email at expense of elevated load on your server