Forum Discussion
Office365 groups spam emails
Hi, My company recently experienced a spear phising attack. Luckily, we discovered it before anything happened. The email was sent to one of our Office365 groups and was freely distributed to al...
Hi Vasil,
Thank you for your answer. You are right the message did pass the group mail spam filter (the one saying delivered) but not for the users as you can see from the image. Do you know if there is anything to do, so this won't happen in the future?
Best regards,
Rasmus
I can only guess - all the details you need are in the message trace/detailed message trace and the message headers. It might be that it failed the dkim check because of the "forward" to the individual users, or the few seconds it took to do that were sufficient for the EOP filters to start recognizing it as actual spam, etc.