On 8/28/2024 at 08:08, Gellner, Oliver via mailop wrote:
Well, entirely for everyone who is not using Google Groups himself. If you have a small user base this might be actually "everyone". You can use the header X-Google-Group-Id. I have so far not seen any other emails from Gmail or Gsuite which include this header.
Thanks! That looks like an excellent header to use for a Postfix REJECT action.
I'll try that for a while and if it's too harsh perhaps leverage the uribl / rhsbl tests Matus suggested with SpamAssassin.
Robert _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
