Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

FQDN Change Question

Posted on 2004-03-29
5
Medium Priority
?
1,160 Views
Last Modified: 2009-12-16
This may seem like a silly question but I am new to Exchange for the most part so...  

It is my understanding that the FQDN can be changed in the Virtual SMTP Server Properties under the Advanced Delivery dialogue box.  I have the Exchange Server registered in external DNS as mail.domain.com.  We had someone set the server up for us as we did not posess the knowledge to do it ourselves at the time.  The problem is that the FQDN is set to our internal DNS settings.  (eg. ServerName.Domain.Local)

Now that more and more admin's are filtering mail by performing a reverse DNS lookup we are running into issues naturally.  My question is:

Will this cause a problem if I change the FQDN to the externally registered DNS name?  (eg. mail.domain.com)

Is this the correct way to fix this problem to begin with?

Thanks in advance for any response.
0
Comment
Question by:chad_morris
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 10

Expert Comment

by:OneHump
ID: 10710295
I answered this in the other thread.  You can change it, no problem.  It doesnt make a huge amount of difference, but the right thing to do would be to change it.  Check the other thread for more details.  :)

OneHump
0
 

Author Comment

by:chad_morris
ID: 10710652
So you are saying that the proper way to change the FQDN would be to change the server name?

Would that cause any problems with my fully functioning Exchange 2000 Server?

The server is not a domain controller so we wouldn't have any problems there.  Basically we are having problems with a couple small clients that are doing a reverse DNS lookup on the mail server and rejecting our mail in an effort to mitigate SPAM from private IP addresses.  I just want to nail this down prior to having a large client having issues receiving mail from us.

At this point I partially agree with you when you say no biggie because the majority don't seem to be performing these lookups, but it is inevitable that there will be a large client that is performing a reverse DNS lookup to thwart SPAM and it will then be a major problem for us.

In re-reading your post on the other thread I am getting that it makes no difference if I change the FQDN to the external DNS.  Correct me if I am wrong.

Basically, if I change the FQDN in the Virtual SMTP Server Properties under the Advanced Delivery dialogue box to mail.domain.com which is registerd in the external DNS will that resolve the problem with the remote mail servers rejecting messages?

Again,

Thanks in advance for any information you can provide!!!

Chad
0
 
LVL 10

Accepted Solution

by:
OneHump earned 200 total points
ID: 10714020
No, that's not what I'm saying.  What I'm saying is that you can change the FQDN in SMTP VS properties.  You never ever want to change your server name.

The FQDN of your server makes little difference.  The most important components of an SMTP server are your MX and PTR records.  The MX records is used to route to your server and most servers won't take email from your server without a PTR record.

It's best to have a matching FQDN but not at all important.  Many ISPs route for hundreds of domains with a server that has a different FQDN.

Don't change your server name!!!!!   :)

OneHump
0
 

Author Comment

by:chad_morris
ID: 10741942
PTR record nailed it!!!

Thanks a ton!!!
0
 
LVL 10

Expert Comment

by:OneHump
ID: 10748075
My pleasure.
0

Featured Post

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Want to know how to use Exchange Server Eseutil command? Go through this article as it gives you the know-how.
Here in this article, you will get a step by step guidance on how to restore an Exchange database to a recovery database. Get a brief on Recovery Database and how it can be used to restore Exchange database in this section!
how to add IIS SMTP to handle application/Scanner relays into office 365.
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…

650 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question