I'm confused, I thought you were saying that a gmail account was autoforwarding mail to your postmaster@ address (ie, with +caf_ in envelope sender).
In which case, you can set up a specific block for mail from that caf address to your postmaster address. With Google Workspace, you can use a content match https://support.google.com/a/answer/1346934 Inbound Messages Advanced content match, Location Envelope sender, and then the email address with the +caf in it, and Equals or contains match type Reject Message Brandon On Mon, Oct 24, 2022 at 11:01 AM Tara Natanson <tara+mai...@natanson.net> wrote: > Brandon, > > The forward is set up to send out our postmaster@ address, So I can't > let it bounce. :( > > Tara > > > On Mon, Oct 24, 2022 at 1:49 PM Brandon Long via mailop <mailop@mailop.org> > wrote: > >> >> >> On Mon, Oct 24, 2022 at 9:09 AM Bill Cole via mailop <mailop@mailop.org> >> wrote: >> >>> On 2022-10-24 at 09:30:29 UTC-0400 (Mon, 24 Oct 2022 09:30:29 -0400) >>> Tara Natanson via mailop <tara+mai...@natanson.net> >>> is rumored to have said: >>> >>> > Yes I know the address @gmail the messages are being sent to. I do >>> not >>> > control that gmail inbox though. >>> >>> Well, you surely understand that to be a (correct ethical) choice, >>> right? You do control an inbox which GMail believes is confirmed as that >>> GMail user, yes? >>> <evil grin> >>> >>> But seriously, just give it a '550 5.7.1' reply at RCPT if possible, or >>> '554 5.7.1' after DATA. Make Google figure it out. >>> >> >> autoforwards should be automatically disabled if they bounce, though like >> with all such things there are heuristics involved (a certain number of >> bounces in a given time). >> I'm sure there are a bunch of ways it could be improved, I think it >> disables it without warning the user, which isn't great (especially if you >> only read mail that's being forwarded), >> but it can probably be re-enabled without re-verifying the address as >> well, which isn't great for this case either. >> >> Brandon >> _______________________________________________ >> mailop mailing list >> mailop@mailop.org >> https://list.mailop.org/listinfo/mailop >> >
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