Got an SBS 2011 server that is rejecting some emails from a certain sender.
I have added the domain to bypass the content filter but it doesn't seem to work every time.
From the logs I can see the email is rejected with the following error
RejectMessage,550 5.7.1 Message rejected as spam by Content Filtering.,SclAtOrAboveRejectThreshold,5,DV:3.3.5705.600;SID:SenderIDStatus TempError
Any idea what might be causing this?