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Old 8th February 2010, 18:52
astewart astewart is offline
Join Date: Feb 2007
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In my case, I have no problems telnetting into localhost 25, but cannot externally.

If you have a router connected make sure you have port 25 forwarded to your Servers internal IP.

If you already have that setup or don;t have a router, then your ISP is blocking port 25, as they are in my case

I have to use the 'relayhost' option in the ISP Server config. Just put your ISP's outgoing mail server there.
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