@deadsuperhero @gruber Oh yes! Gmail and others deciding that "small" email providers were to be labeled as spam just because they're not enterprise sized* would be like a couple of massive mastodon instances (like .Social and the incoming Meta) deciding that small instances were silenced by default even without a history of bad behavior.
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* Happened to my alma mater, 20k+ accounts, back in the 00's, so they had to abandon running their own service.