Grant,
Project Tar looks like a privacy nightmare to me. Routing my mails to a stranger in case senders just don't honor the standard and dont talk to my primary MX. They promise to reject, but who knows. At least in EU/Germany, that is against the law (GDPR/DSGVO) Stefan Von: Grant Taylor via mailop <mailop@mailop.org> I prefer a slightly different approach. 1) Point the primary MX at a server with nothing listening. It will send TCP Resets. -- I know this as "No Listing", a varient of "Grey Listing". -- I have yet to see any negative side effects wit this. 2) Point the secondary MX at your main mail server. -- Business as usual. 3) Optionally - Point the tertiary at your backup mail server. 4) Point the last MX at something like Project Tar. [1] Project Tar - https://wiki.junkemailfilter.com/index.php/Project_Tar
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