Sorry it's taken me so long to reply, but I've been busy and could only do minimalistic replies, so I have waited until I had more time to delve in deeper... While the Gmail hack is no longer necessary, unfortunately Microsoft's outlook "hack" is still needed due to its difference... looking at the unmodified Received: headers in https://www.spamcop.net/sc?id=z6513483714z596b7c076a2121c3ce82e632cf6e31a3z [line] (Received origin/destination) [0001] Received: from PU1APC01HT007.eop