Forum Discussion
Exchange transport rule
Hello, I been beating my head against the wall trying to get this. scenario: My company want to block all attachments that are sent internally. Attachments can be sent external...
You could add a rule that blocks the message when the message contains an attachment and the recipient is internal with an exclusion for when the recipient is external. My suspicion is that this won't work as the message is usually exploded for all recipients so the rule runs against all the messages as part of the chain (so the rule will block the internal massages but allow the external ones when both external and internal recipients are included). I could be wrong though, so worth testing.