Mail to nowhere

Steve Matzura number6 at
Tue Jun 16 23:05:43 UTC 2015

On Tue, 16 Jun 2015 17:31:07 +0000, you wrote:

>By default, most MTAs only listen to localhost, so don't accept
>externally derived mail. Try telnetting to port 25 on the machine
>from some place off your machine's network. If you get a "hang",
>it's likely a firewall issue. If you get a "connection refused"
>message it's probably that the MTA isn't listening on the external
>If the MTA responds, do a manual delivery exchange and see what you
>If you're not seeing anything in your maillog, this is very likely
>an issue with your MTA's configuration, not dovecot.

Now that I think about and concentrate on what you wrote, make perfect
sense. Add to that the fact that I received bounces from my ISP that
all said the same thing: Unable to establish an SMTP connection. The
return code was 4.5.1.

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