Exchange Server is rejecting message after "MAIL FROM" with "500 5.3.3" with tarpit despite being a Trusted Receiver
- by Don Rhummy
I'm getting the message: "500 5.3.3 Unrecognized command" from Exchange server and seeing in the Exchange Server logs that it's tarpitting my smtp sender despite the fact that:
I added a Receive Connector for my ip that allows connection, uses "Externally Secure"
I ran the commands (with the actual server name):
CODE:
Set-ReceiveConnector "MyTrusted connector (Servername)" -MaxAcknowledgementDelay 0
Set-ReceiveConnector "MyTrusted connector (Servername)" -TarpitInterval 0
Despite all that, it STILL fails! Any idea what's wrong?