Does it possible to know the emails that's rejected at the edge/perimeter of EOP(Defender for o365)?

Question

As the email get rejected at edge level, does it possible to know from which sending IP emails got rejected in Defender for o365 portal ?

vasilmichev · Answer

Depends on which filter blocked it, but generally speaking no. Run a message trace based on sender/recipient details, if it's not visible therein, it's either blocked on the edge or never reached M365.

kidd_ip · Answer

vinay2010&nbsp;&nbsp;Message trace can provide more insights&nbsp;

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Does it possible to know the emails that's rejected at the edge/perimeter of EOP(Defender for o365)?

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