On 9/14/2020 6:35 AM, Fourhundred Thecat wrote: > Can I reject messages that have different envelope from and header from? > > Or what would be the best approach ?
Are you publishing an SPF record? Are you using DKIM? Are you publishing a DMARC policy (even one with policies of none)? Are you using Apache SpamAssassin? Regards, KAM