Question is simple (or so I thought). I would like to create a transport rule to filter a specific attachment - *.rar. We have a spam control mailbox created and working as expected. However - I am not able to filter attachments. The message seems to pass through and not care.
Thoughts? Am I missing something?
The rule that has been created is:
Attachment ScreeningIf the message...includes any of these words in an attachment: '.rar'
Do the following...Redirect the message to 'spamcontrol@DOMAIN.com'
Additional propertiesSender address matches: Header