From: Arne Hoffmann (arnefish.in-berlin.de)
Date: Sat May 10 2008 - 16:04:13 CDT

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Avi Schwartz wrote:
> When I try to send an email via my server I find the following in the log:
>
> May 10 15:15:11 coral postfix/qmgr[4449]: 73A64F64001:
> from=<xxxxxxxxxxxxx.com>, size=1117, nrcpt=1 (queue active)
> May 10 15:15:11 coral postfix/smtp[6660]: connect to
> smtp.comcast.net[76.96.30.117]: Connection refused (port 587)
> May 10 15:15:11 coral postfix/smtp[6660]: 73A64F64001:
> to=<xxxxxxgmail.com>, relay=none, delay=2253, delays=2253/0.02/0.16/0,
> dsn=4.4.1, status=deferred (connect to smtp.comcast.net[76.96.30.117]:
> Connection refused)

This is a problem with some kind of packet filter or firewall, not a problem
with your Postfix config.

> Using telnet I can see the following:
>
> aviminnow:~$ telnet smtp.comcast.net 587
> Trying 76.96.30.117...
> Connected to smtp.g.comcast.net.

OK, this seems to be a different machine ('minnow'). Try to connect to
smtp.comcast.net with a telnet client from coral (should fail with
'connection refused'). Check the packet filter on coral.

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