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Emails bouncing (wrong domain name in some setting)

Hi Guys,

Here is the problem, emals are bouncing back with the following error message.

From: System Administrator
Sent: Wednesday, November 29, 2006 9:35 AM
To: j.santopetro@dsarchitects.com
Subject: Undeliverable: i4Vision - Report on your Website

Your message did not reach some or all of the intended recipients.

The following recipient(s) could not be reached:

j.santopetro@dsarchitects.com on 11/29/2006 9:31 AM
The message cannot be delivered due to a configuration error on the server. Please contact your Administrator.
<4vision.com #5.3.0 smtp;553 5.3.0 ... denied>

we are running a microsoft exchange version 6.5.7638.1 on a windows server 2003, we have reverse lookup properly configurated in our DNS.
the problem is, that as you can see the error message says <4vision.com ....> and our domian name is i4vision.com, there is a letter missing on it.
will that be the problem?
i'll appreciate if you guys can take a look to this problem and give us some information...
if you need further information please let me know.!!
Regards,
Marcelo.
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Exchange_Admin

Well for one thing you do not have a reverse DNS record in your PUBLIC DNS records.

The RDNS should be configured for you by your ISP.

You stated:
"we have reverse lookup properly configurated in our DNS."
This will not help if the receiving domains do a reverse DNS lookup unless your DNS is visible from the public world.
Avatar of upul007
ran a check on the i4vision.com name at www.dnsstuff.com using the DNS report tool. There were a few errors. Please check it out and correct.
Recheck your reverse DNS entries at your site and at the ISP's site as well as correcting the SPF records. Check afterwards.
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upul007
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ASKER

Hello people, thanks so much for the feedback. Yes.. looks like that particular email address is having some problems , and some things with our dns are wrong.
I'll get back to you once we solve it!
Thank you
Marcelo