[35mm]

> Does some magic kick in and move - in real time - all identical (similar?) messages out of Inboxes and into Spam folders across the globe?

Not exactly. But the domain they are sending from will get added to shared blacklists.

Spammers don’t send all in one go, so that same message going out to the next batch of people could be stopped.

[logifail]

> Not exactly. But the domain they are sending from will get added to shared blacklists.

In real time? After one report or are multiple reports of a spammy domain required?

I use blacklists (and indeed greylisting) on my personal email servers but I'm curious how much we know about how MSFT/O365 and Gmail handle this stuff.