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Old 18th February 2009, 23:45
laidbackwebsage laidbackwebsage is offline
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Default Problem with Postfix and SMTP port 25

I followed the "Perfect Hardy Heron Ubuntu Server" step by step, but I am still unable to access my remote SMTP server from my desktop (i.e., I cannot send a test email using Thunderbird.)

The server resides on a VPS host, and I can send mail from the command line. However, I cannot connect to the SMTP server via Thunderbird, not can I telnet to port 25.

How do I:
  1. Test if port 25 is open?
  2. Open it safely if it isn't?
  3. Change the port if my local ISP is blocking it?

Thanks!

Kevin J
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