[ubuntu] No mail, incoming or outgoing...

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http://ubuntuforums.org – Hello, (Sorry if this is posted in the wrong area, or already being covered elsewhere, but i am new to ubuntu server, and this issue is driving me mad) I thank you for any light you may be able to shed on this issue. I am having trouble with my mail server, i can send and receive mail locally with telnet or netcat via port 25 e.g telnet localhost, i can even telnet mail.example on port 25. But i can't mail out to hotmail, my mail.log says connection timed out. Now here is the confusing part, it times out on every port i try... I have phoned my ISP and they assure me, port 25 is not blocke (Hardware)