RE: [cobalt-users] Re: Returned email?

["John Burgess" <john.burgess@xxxxxxxxxx>]

I believe the problem to be that although www.autobots.net resolves to
198.92.128.204, a lookup on that ip address does not seem to resolve.  There
does not seem to be a ptr record to the hostname for that ip address.  Some
(most these days) smtp gateways are configured only to accept email from
those hosts who can be verified that the ip address resolved from a name
lookup resolves back to the same name when a reverse lookup is done.

John Burgess
President, Allegro Data Systems
12500 Network, Suite 401
San Antonio, TX  78249
+01-210-558-0709
+E-mail <mailto:john.burgess@xxxxxxxxxx>
+Digital Message <mailto:2102400245@xxxxxxxxxxxxxx>
Fastex.net <http://www.fastex.net/>

-----Original Message-----
From: cobalt-users-admin@xxxxxxxxxxxxxxx
[mailto:cobalt-users-admin@xxxxxxxxxxxxxxx]On Behalf Of Jonathan Park
Sent: Sunday, January 30, 2000 2:42 PM
To: cobalt-users@xxxxxxxxxxxxxxx
Subject: [cobalt-users] Re: Returned email?


Here is the complete headers:
==================================================

   **********************************************
    **      THIS IS A WARNING MESSAGE ONLY      **
    **  YOU DO NOT NEED TO RESEND YOUR MESSAGE  **
    **********************************************

The original message was received at Sat, 29 Jan 2000 02:02:10 -0500 (EST)
from ida01.pub02.mail.com [165.251.48.70]

   ----- The following addresses had transient non-fatal errors -----
<paul.vandezande@xxxxxxxxx>

   ----- Transcript of session follows -----
... while talking to in-mx.chello.be.:
>>> MAIL From:<admin@xxxxxxxxxxxxxxxx> SIZE=814
<<< 451 <admin@xxxxxxxxxxxxxxxx>... Sender domain must resolve
... while talking to br-mx.chello.be.:
>>> MAIL From:<admin@xxxxxxxxxxxxxxxx> SIZE=814
<<< 451 <admin@xxxxxxxxxxxxxxxx>... Sender domain must resolve
<paul.vandezande@xxxxxxxxx>... Deferred: 451 <admin@xxxxxxxxxxxxxxxx>...
Sender domain must resolve
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old
===================================================


>Message: 3
>Reply-To: <dan@xxxxxxxxxxxxx>
>From: "Dan" <dan@xxxxxxxxxxxxx>
>To: <cobalt-users@xxxxxxxxxxxxxxx>
>Subject: RE: [cobalt-users] Returned Email?
>Date: Sun, 30 Jan 2000 10:35:16 -0500
>charset="iso-8859-1"
>Reply-To: cobalt-users@xxxxxxxxxxxxxxx
>
>It would help if you posted the complete headers with no changes.
>
>--
>Dan Kriwitsky
>
>
>>
>> I use Raq3 and I keep getting the returned email as
>> undeliverable with the note:
>>
>> "Sender domain must resolve"
>>
>> What is this mean?
>> Why is this happening?
>>
>> How or what can I do to prevent this?
>>
>> Any input will be greatly appreciated.
>>
>>

--__--__--


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