Exchange Server Behind Firewalla Gold

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Coolruehle

• January 28, 2021 02:29

Got an Exchange server behind Firewalla Gold, opened ports 443, 587, 25, and 53 to the Exchange server. Server sends mail fine, cannot receive.

Microsoft Remote Connectivity Analyzer says:

Testing TCP port 25 on host mail.xxxxxxxxxx.com to ensure it's listening and open.The specified port is either blocked, not listening, or not producing the expected response.

25 is open to the server. 

What else am I missing?

 

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  Coolruehle

  • January 28, 2021 02:46

  Ha Ha!  NAT for port 25 was not set.

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