Remote Server returned '550 5.7.705 Access denied, tenant has exceeded threshold.

Copper Contributor

what does this mean? Why can't I send emails?


2 Replies



Base on the error message, it seems Exchange Online Protection (EOP) filters identify a very large volume of suspicious email coming from your tenant and triggers a block of outgoing email action
Several different reasons may occur, please make sure your Exchange in terms of SPAM and report to Microsoft to unlock


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