Solved

Setting up PTR record when hosting multiple domains

Posted on 2011-03-13
7
789 Views
Last Modified: 2012-05-11
So I recently setup an exchange server. We have 1 static IP and we host 2 different domain names. I had the ISP setup 2 PTR records.....1 for each domain name pointing to the same IP address. Is that the correct way to do it ?
0
Comment
Question by:WiddleAvi
[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
  • 2
7 Comments
 
LVL 76

Accepted Solution

by:
Alan Hardisty earned 125 total points
ID: 35123334
No - you only need one PTR record - not two.

All that has to happen is the FQDN configured as Reverse DNS needs to resolve to the IP Address in DNS - nothing more.

The FQDN on the SEND Connector / SMTP Virtual Server also needs to resolve in DNS to the same IP Address, thus multiple PTR records don't help any.
0
 
LVL 74

Expert Comment

by:Glen Knight
ID: 35123337
No, the way it should be is:

Domain1

A record: mail.domain1.com
MX = mail.domain1.com
PTR = mail.domain1.com

Domain2

MX = mail.domain1.com

Domain3

MX = mail.domain1.com
0
 
LVL 19

Expert Comment

by:Miguel Angel Perez Muñoz
ID: 35127780
I suggest that:

Create a DNS name to exchange server. Example: server1.domain.com
Create a PTR for this name and IP.
Create an alias (CNAME) on domain1 and other for domain2. Example mail.domain1.com= server1.domain.com; mail.domain2.com= server1.domain.com
Create a MX zone for domain one pointing to alias.domain1 and create second MX zone for domain2. Example: on domain1, MX= mail.domain1.com; on domain2, MX=mail.domain2.com

0
Edgartown IT Case Study

Learn about Edgartown's quest to ensure the safety and security of the entire town's employee and citizen data. Read the case study!

 
LVL 74

Expert Comment

by:Glen Knight
ID: 35127811
Drashiel, that's a very complicated way of doing it, especially when there is already a valid solution posted.
0
 
LVL 19

Expert Comment

by:Miguel Angel Perez Muñoz
ID: 35147046
Maybe, but is more elegant and some spam fliters check PTR to filter connections ;)
0
 
LVL 74

Expert Comment

by:Glen Knight
ID: 35147174
yes and as long as it resolves correctly it will not be detected as SPAM.

I use the method I posted above and it works perfectly for around 20 domains.
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 35148118
I also only have one Reverse DNS record for about 40 domains and don't have any issues sending out mail to anyone!!
0

Featured Post

Office 365 Training for IT Pros

Learn how to provision tenants, synchronize on-premise Active Directory, implement Single Sign-On, customize Office deployment, and protect your organization with eDiscovery and DLP policies.  Only from Platform Scholar.

Question has a verified solution.

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

Find out what you should include to make the best professional email signature for your organization.
Read this checklist to learn more about the 15 things you should never include in an email signature.
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

751 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