I self host my email since 20+ years. Always done with the postfix + dovecot stack with the works (dkim dmark DNS stuff etc).
In the last few years I just removed all spam filters as they where a chore and didn’t provide no much benefit (3-5 spam emails per week) even if my main email address has been out and about for at least 2 decades or more.
Recently, last few weeks, spam is picking up to the point I receive some 10+ spam emails per day and this is pretty annoying, obviously.
So, what are you doing for spam filtering at server level nowadays? Is it still spamassassin circus? Anything better or more efficient?
rspamd is used nowadays. Add sieve filtering to automatically move mails with a 7.0 or higher to a spam-folder. Manually move mails there that haven’t been detected and move mails out of the spam folder that have been falsely detected (personally don’t have any false positives with rspamd).
Then set up bayes learning with rspamd, either when mails are moved between folders or every few hours.
Do you have documentation or references on how to setup rspamd?
I just googled something. Don’t remember what I ended up on. Probably some blog post combined with rspamd’s website. It depends on your mailserver anyways.
Rspamd seems to be common, it’s included in the mailcow stack and others. Seems to work pretty good, I’ve been on Mailcow for several years now with no major spam issues after I dialed it up a bit.
Are you serving from a homelab or VPS? If a homelab, then you could use pFsense to filter spam. I don’t run my own email server but I do use pFsense to filter 95% of the junk from my inbox. I’m not sure how you’d accomplish that on a VPS other than employing some type of spam filtering software.
How do you block email spam with a firewall?
DNSBL and filter lists. You can use PfBlockerNG to import abuse lists, botnets, known open relays which reduce spam. You can also apply GeoIP blocklists to upstream SMTP hosts.
What? I have opnSense how would I filter spam with it?
https://lemmy.world/post/45508262/23179666
ETA: I know what opnsense is, I have never used it so I am unaware of all of the packages it can run.
I definitively also observe the recent increase of spam (mostly on info@domain) however spamassassin (after some training) does a decent job sorting the trash out. Also I use a unique email address for each website I register, this way a lot of spam was removed by blocking an email-address I’ve used for login to facebook 10 years ago.
It’s been a while since I selfhosted my email, but I found it pretty efficient to set up a spam filter that periodically logged into my Gmail address and used its spam folder to train a bayes classifier.
