We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you two Citrix podcasts. Learn about 2020 trends and get answers to your biggest Citrix questions!Listen Now


Some clients can't receive e-mail from our mail server

RMITV asked
Medium Priority
Last Modified: 2010-03-06
We just moved our exchange 2000 server to a new network connection a week ago and therefore the external IP address has changed.  Our ISP changed the MX records (forward and reverse DNS lookups) to point to and from the new IP.
Inbound traffic is fine but oubound seems to be giving us a problem.  Some clients are unable to receive e-mail from our mail server.  These e-mails just seem to stay in the queue on our end.  Is this something on the recipients end? Any suggestions.


Watch Question

I belive that you have reverse DNS Lookups for your Mail Gateway. Can you the NDR received so that we can debug some more on this issue

Hi Mike,
Please check for reverse DNS lookup in the following site. http://www.dnsstuff.com.  CHeck that reverse lookup points to your right hostname.


The reverse lookup is pointing to the correct hostname however we believe that when an e-mail is sent from our exchange server it appears to be coming from the old hostname.  Can someone please help us configure it so that it shows that all e-mails are coming from the new hostname.  I hope this makes sense.

Expert of the Year 2007
Expert of the Year 2006
http://www.amset.info/exchange/dnsconfig.asp should tell you what you need.


Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts

Go into the Default SMTP Virtual Server Properties.
Click on the last tab and then modify the FQDN, (if you hostname has changed),
and also modify the external DNS server ip address.

Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.


Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.