I mentioned that I had opened a Microsoft support ticket on this 'fraud detection' issue. I got a phone call today closing the ticket. They were very nice, but
essentially told me that O365's new "Email Safety Tips" feature noted that a mailing list user who posts a note to an off campus server and then receives a copy of that original message from the mailing list (Sender: the list server host and From: the original
poster) trips the mechanism to mark the message with the fraud detection warning. Basically it was a "works as designed" response.
I was given two steps to perform.
In my case this will involve fielding dozens or hundreds of complains about the interaction of O365 and LISTSERV and helping remote clients contact their site
O365 administrators about the wisdom of turning off Microsoft's Email Safety Tips.
If you are also having trouble with these fraud detection warnings, I would suggest that you also open an Office 365 support ticket to let them know how wide spread
this feature affects their clients.
Good luck,
-Rich Helmke
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