You can see what we do about this here: https://github.com/mxroute/da_server_updates/blob/master/exim/exim.acl_check_recipient.pre.conf
Look for the "Blocking non-whitelisted messages from Google Groups" part. The first one in the whitelist is "googlegroups.com" because the spam almost entirely comes from Google Workspace domains, in our experience. Since we've deployed that, despite the massive increase in customers we've had since then, we've only whitelisted 41 domains. Processing 41 whitelist requests was the lesser evil to the complaints about spam coming from Google Groups, and that decision continues to prove itself as the right one for our user base.
Not to say it's the "right" way, but maybe something to consider for your situation.
Jarland On 2026-03-19 08:55, Scott Q. via mailop wrote:
I'm wondering if Google completely lost control over their Google Groups (?). I've never seen so much abuse from them like we did in the past 2 weeks or so. Single group, double-group hopping, everything gets abused and there's no sign of stopping. At this point we're just marking all of them as Spam and telling users to add known senders to allow list. Anyone else seeing the same ? Scott _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
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