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> get Google IPs blacklisted (yes this happens,

This

> there are no special breaks for Google).

and this are not the same thing. There are absolutely "special breaks" for Google, particularly (though not solely) since they are now the server of choice for a huge percentage of the email being sent and received, whether @gmail.com or on Gsuite accounts of various types.

So even if there were some kind of massive spam event, Google isn't going to block emails from its own IP blocks or domains from reaching Gmail or Gsuite customers. And frankly, I would be shocked if any of the various DNS blocklists that people use for determining who's a dirty spammer would actually put a Google IP block on there without massive and obvious changes in Googles mode of operation.

Meanwhile, us mere mortals, if we dare to try to set up our own mail server, can be listed in a blacklist because of a) something the previous owner of the IP address did, b) something someone else in the same class B block did, or c) something that was never expected before, but now because of escalation by spammers, it's required without any documentation. And then the blacklist just doesn't respond to requests for reconsideration or elaboration because obviously, we're dirty spammers, and why should we be listened to?



even if there were some kind of massive spam event, Google isn't going to block emails from its own IP blocks or domains from reaching Gmail or Gsuite customers

When I worked there it absolutely did do this. Yes it seemed stupid to me at first too, but all it takes to end up like that is to decide not to give yourself unfair special exceptions to your own policies, which is how things should be!

frankly, I would be shocked if any of the various DNS blocklists that people use for determining who's a dirty spammer would actually put a Google IP block on there

Be shocked. It did happen when a particularly clever spammer got through the controls. There are no bits of logic in most email servers that say "if IP is owned by Google, ignore". Spam filters are all relative. If senders send a lot more good mail than bad, they're good. If they send a lot more bad mail than good, they're bad. Google IPs are rarely blocked because they send a lot of good mail and invest a huge amount of money and time in keeping it that way.




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