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RE: [Help] Connection failed
From: D.J. Fan (mr88talent
hotmail.com)
Date: Sun Aug 28 2005 - 14:02:10 CDT
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>Hi,
> I am new to postfix, and I have setup a SMTP server on db.grids.cn.
> By unmasking the parameter:
> mynetworks =
> I am able to connect this server from my gateway machine with
>'telnet db.grids.cn 25'.
> However, from the intranet (connecting to internet from that
>gateway), I get only error message of 'connection failed on port 25'.
>
> Can anyone tell me why this happens?
>
> Thank you all!
>
I would guess your router/nat-box/firewall/local-firewall is blocking
incoming port 25.
I don't know if you are using iptables or not, but show output from:
postconf -d mynetworks
postconf inet_interfaces
iptables -L | grep -E 'smtp|domain'
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