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

Occasional Visitor

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

 

2 Replies

@claireturner 

 

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

 

Get support - Microsoft 365 admin | Microsoft Learn