I'm having a difficult time understanding how to set-up and test a basic James configuration, especially for sending messages.

First, my configuration: 3.0 M3 20110509.105439-346 on Ubuntu (Natty) 64-bit.

Ports 25 and 143 are open (I've decided to go without encryption until I can get the server functional).

I can receive mail from the Internet on port 25. I can access that mail remotely using IMAP on port 143. However, I can NOT send mail using SMTP as my client never connects. SMTP connections from a client on the server succeed. I believe outgoing connections to port 25 from remote clients are being blocked at the client ISP - and in an odd way too because telnet connections to 25 don't fail but rather remain blank.

So ... two questions:

(1) Is there a way to move the basic unencrypted client-server communication (for sending messages) off port 25 (where it was getting blocked) while leaving SMTP configured to receive server-server communication (which is working fine)?

Previously I tried changing the port in smtpserver.xml but it broke my server-server communication and I couldn't receive mail anymore.

(2) Is the unencrypted setup really any easier to start with?

I am starting to feel like jumping into my start/TLS configuration might be no more work than the port workarounds that might be necessary to test the "basic" (unencrypted) server.

Thanks
-Dwayne

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