i run my own email server, using a spam filter i set up years ago without explicit blocking (only tagging and filtering) and didn't touch it since. the amount of spam i get is negligible. a few false positives, but nothing serious. in fact it's so little i could probably just leave all the spam in the inbox. it is tagged as spam anyways.

I've just been the target of some spam "campaign" on my own email server. By the time I was annoyed enough to block some IPs and add a custom spamassassin rule for them, they had already stopped. It lasted two days.

Other than that it looks like I get like 4 spams per week.

Mind, i don't publish my email anywhere. If you look at my profile on here you'll get a gmail address.

I have my own email server with a wildcard address (I still use gmail for anything that's actually important). I put certain addresses in shady forms a few times. I get a couple of spam messages per day to those addresses - always the same spam few spam campaigns. One is offering to sell me electric bicycles or partner with me to sell electric bicycles (didn't really pay attention) and more recently I started getting business proposal advance fee spam. The volume is pretty manageable and if I wanted, a pretty simple filter tuned for the spam I actually get would catch all of it and no ham.

I got spam to postmaster once for some reason. That's a nice way to make admins aware of your spam campaign.

Spam is presumably more of a problem when you're more well-known and you don't have the option to control your own filters.