We help IT Professionals succeed at work.

Reverse DNS issue

Medium Priority
Last Modified: 2013-12-14
I am getting a non deliverables from this outside servers.

The recipient could not be processed because it would violate the security policy in force
<xxxlaw.com #5.7.7 smtp;554 5.7.7 PTR invalid

I think my problem is this:

We use Exchange 2003 to send out email which is set up to go out via our Comcast line.  However, our incoming email comes in from our Verizon line.  There is a ptr record for our Verizon public IP but not one for Comcast which is used by the Exchange to send out.  Do I need to set up another pointer record for the Comcast public IP that we send out from?
Watch Question

Yes you do.

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

Ask the Experts
Rodney BarnhardtServer Administrator

You can test your mail on www.mxtoolbox.com and find any corrections you need to make to your network.
SurajSenior System Engineer

Let me help you...

what ever connecting IPs you have you should have a PTR Record set up for it...
For PTR Record you need to contact Your ISP and there you need to ask them to create the PTR record for your connecting IP.

let me know if you want help find your connecting ip....

SurajSenior System Engineer

do the following on the command prompt :

telnet maila.microsoft.com 25

after ehlo you will find one IP address showing up.. That is your connecting ip
you can also go to www.whatismyip.com and find it...

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.