Re: [cobalt-users] Sudden Failure To Send Mail/MX Loop Problem

["Al-Juhani" <aljuhani@xxxxxxxxx>]

Hello,

Short Answer, Remove MX and A record gexaenergy.com.psxnation.com as I think
sendmail is confused by the first part gexaenergy.com.

Long Answer, your domain: gexaenergy.com has one MX record:

gexaenergy.com pointing to mail.gexaenergy.com [64.78.61.8]

The Other domain psxnation.com has one MX record:

psxnation.com pointing to psxnation.com [216.234.188.15]

The IP address of the hostname "gexaenergy.com.psxnation.com" is the same as
the IP address of your www.psxnation.com
which is 216.234.188.15 so you see why you have a probelm with MX loopback.

Now, the MX mail.gexaenergy.com is listening to port25 smtp accepting email
from outside BUT when you try to send a message from the server "localhost"
or any local smtp within the server, sendmail will check
/etc/mail/local-hostame and will deliver the message through
gexaenergy.com.psxnation.com instead of mail.gexaenergy.com.

If you check the /etc/mail/local-hostnames you will find an entry for
gexaenergy.com.psxnation.com.  Actually using the telnet if you connect to
hostname gexaenergy.com.psxnation.com on port 25 "smtp" you will get
sendmail greeting for www.psxnation.com domain.  Also if you paste
gexaenergy.com.psxnation.com to the browser it will redirect to
www.psxnation.com.

As I mentioned above you will need to remove gexaenergy.com.psxnation.com
from your DNS.

Regards,

aljuhani@xxxxxxxxx



----- Original Message ----- 
From: "boo radley" <stuckonashelf@xxxxxxxxx>
To: <cobalt-users@xxxxxxxxxxxxxxx>
Sent: Sunday, August 24, 2003 17:55
Subject: [cobalt-users] Sudden Failure To Send Mail/MX Loop Problem


> Hello,
>
> To anyone that can help. I have a RAQ4 that I have
> maintained for a couple of years now. 4 Days ago for
> no apparant reason that I can find my ability to SEND
> email has stopped. Receiving mail continues to work
> fine but whenever I send any mail the server is
> somehow adding my URL to the end of the sent to
> address. EX:
> I create an email to someone@xxxxxxxxxxxxx and hit
> send as I did normally before this problem occured.
> The email then acts as if it sends. A few moments
> later it is returned with the error " ----- The
> following addresses had permanent fatal errors -----
> <carol@xxxxxxxxxxxxxx>
>
>    ----- Transcript of session follows -----
> 553 gexaenergy.com.psxnation.com. config error: mail
> loops back to me (MX problem?)
> 554 <carol@xxxxxxxxxxxxxx>... Local configuration
> error
>
> As you can see above it is adding my psxnation.com URL
> to the end of the original gexaenergy.com address
> which of course would make the email bounce back. As I
> said earlier all email sent to me is working fine, its
> only when I attempt to send mail and here's the weird
> part. I can successfully send mail to YAHOO email
> addresses without this problem occurring. I am totally
> baffled. Please help.
>
> Brian Gray
> http://www.psxnation.com