From: /dev/rob0 (rob0gmx.co.uk)
Date: Sun Oct 01 2006 - 16:26:40 CDT

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On Sunday 01 October 2006 16:02, mrk krm wrote:
> between localhost users/domains, but i can't send or receive outside
> (internet). My router has the port 25 open and my domain is
> subsolo.no-ip.org (dynamic dns).

One small addendum:

$ telnet subsolo.no-ip.org 25
Trying 82.154.74.37...
telnet: connect to address 82.154.74.37: Connection timed out

You're not reachable from the outside.

> my log file reports this:
> > Sep 28 23:33:57 debian postfix/smtp[17578]: F2CCFA3755:
> > to=<mrk_0linuxmail.org>, relay=none, delay=57, >status=deferred
> > (Host or domain name not found. Name service error for
> > name=linuxmail.org type=MX: Host >not found, try again)
>
> what could be the error? I searched for 3 days and now i come here to
> ask your help. thank you a lot.

Some cheap consumer-grade routers don't support protocols that their
manufacturers didn't understand, such as DNS. Perhaps your router is
one of those, only able to retrieve "A" records, unable to retrieve
other RR types.
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