550 cannot route to sender

bind at col7.metta.lk bind at col7.metta.lk
Wed Nov 17 10:47:18 UTC 1999

On Tue, Nov 16, 1999 at 09:48:23AM -0500, Joseph S D Yao wrote:

Hi Joseph,

You have helped me a few times earlier, thanks for that.
I do not think I have explained myself well enough this time.

> > I have set up Qmail on "metta.lk" (
> > and use autoturn to get my mail to "col7.metta.lk" (
> > Everything works quite well.
> > To some domains I get messages like the below returned by Mailer Daemon.
> > Is this a DNS problem on my machine
> > or is it because I am on local IPs
> Private internet addresses, such as col7's, should never be visible in
> DNS to the general Internet.  It looks like the remote host found the
> address for col7, and tried to send it directly. 

Sorry for the confusion, but it is me that is sending to a remote host.
and my messages are getting returned.
Please see below returned message.


Delivered-To: bind at col7.metta.lk
Date: 17 Nov 1999 01:54:37 -0000
From: MAILER-DAEMON at metta.lk
To: bind at col7.metta.lk
Subject: failure notice

Hi. This is the qmail-send program at metta.lk.
I'm afraid I wasn't able to deliver your message to the following
This is a permanent error; I've given up. Sorry it didn't work out.

<Rainer.Klier at erl.sbs.de>:

Connected to but sender was rejected.
Remote host said: 501 <bind at col7.metta.lk>... Sender domain must exist

--- Below this line is a copy of the message.

Return-Path: <bind at col7.metta.lk>
Received: (qmail 16316 invoked from network); 17 Nov 1999 01:52:25 -0000
Received: from col7.metta.lk (HELO metta.lk) (root at
  by dhamma.metta.lk with SMTP; 17 Nov 1999 01:52:25 -0000
Received: (qmail 5562 invoked by uid 523); 17 Nov 1999 01:14:13 -0000
Date: Wed, 17 Nov 1999 07:14:13 +0600
From: bind at col7.metta.lk
To: Rainer Klier <Rainer.Klier at erl.sbs.de>
Subject: Re: Docu ?
Message-ID: <19991117071413.A5555 at col7.metta.lk>
References: <383120C1.F9B5D238 at erl.sbs.de>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Mailer: Mutt 0.95.4us
In-Reply-To: <383120C1.F9B5D238 at erl.sbs.de>; from Rainer Klier on Tue, Nov
+1999 at 10:15:45AM +0100

On Tue, Nov 16, 1999 at 10:15:45AM +0100, Rainer Klier wrote:

Hi there ...

> is there a good documentation for bind 8? Is there a FAQ ?
> Before I ask more stupid questions, I thought I4d better
> ask first for a docu :) I downloaded bind-doc.tgz, but
> it isn4t that detailed.

There is a very good and simple howto on most linux CDs
on RH I think /usr/doc/HOWTO/DNSsomething-or the-other

If you do not find a copy, just drop me a line and I shall send it to you.


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