[mobjack]

Email spam has went down mostly from self regulation.

ISPs are vigilant about blocking IP addresses with bad spam reputation. They also block IPs that have a sudden surge in volume.

Email marketers have to manage their own IP address reputations to be effective. If too many people mark your email as spam, then the IP could be blacklisted.

[nojvek]

Not to discount the anti-spam algorithms. I religiously mark spam emails as spam. Gmail is quick at learning. 90% of my email is promotions which I never look at.

I just hope gmail had an auto unsubscribe. Most of the time unsubscribe doesn’t work since sites require humans to click some button or entire their email again.

I am far more worried about real mail spam. Can I do something about that ?

[dillonmckay]

I think it has more to do w/ SPF, DKIM, and DMARC enforcement.

I think your IP becomes blacklisted simply by being reported to a blacklist.