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List:       postfix-users
Subject:    RE: 553 Error
From:       "Andy Hsu" <ahsu () nobelglobe ! com>
Date:       2002-09-30 18:49:15
[Download RAW message or body]

The issue only stemmed from this one user, whereas everyone else seems
to have no problems.  I'm also able to send and receive messages from
the postfix newsgroup, so I doubt that it is a DNS issue on our end.  I
did a dig from machines inside and outside of our network to be sure,
and everything is coming up positive.  It would appear then that this is
something that will need to be resolved on their end.

Thanks for the help,
--Andy


-----Original Message-----
From: Ralf Hildebrandt [mailto:Ralf.Hildebrandt@charite.de] 
Sent: Monday, September 30, 2002 11:19 AM
To: postfix-users@postfix.org
Subject: Re: 553 Error

On Mon, Sep 30, 2002 at 10:47:37AM -0700, Andy Hsu wrote:

>             < our.mail.server #5.0.0 X-Postfix; host
> their.mail.server[xxx.xxx.xxx.xxx] said:   553 <user1@domain1.com>...
> Unknown host/domain domain1.com>

DNS problem on their or your end. Are you sure you domain's DNS are up
and reachable?

> Off the top of my head, it looks like a DNS issue on their end, but
why
> would that cause incoming mail that has already reached their gateway
to
> bounce?

reject_unknown_sender_domain?

-- 
Ralf Hildebrandt (Im Auftrag des Referat V A)
Ralf.Hildebrandt@charite.de
Charite Campus Virchow-Klinikum                 Tel.  +49 (0)30-450
570-155
Referat V A - Kommunikationsnetze -             Fax.  +49 (0)30-450
570-916
I was married by a judge. I should have asked for a jury. - Groucho Marx

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