certain domains bounce back email- mx changed over weekend

we changed our ISP, which changed MX record. email is sending fine with the exception of twc, aol and windstream...those emails get undeliverables. Using Exchange 2010 and outlook 2010
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Simon Butler (Sembee)ConsultantCommented:
And what does the NDR say?
If you changed the ISP at the weekend I would expect all caching to be flushed now.

Use this tool to identify if the internet is seeing the correct MX record across the world:

A trick I have used in the past is to create a new A record and MX record, pointing to the same IP address. That can kick things in to life.

350ztnAuthor Commented:
it looks like that is all setup? screen shots attached
Simon Butler (Sembee)ConsultantCommented:
That is looking at the ISP's systems.
There is no guarantee that is what the world sees, which is why you need to check with public tools and also provide the content of the NDR.

Determine the Perfect Price for Your IT Services

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden with our free interactive tool and use it to determine the right price for your IT services. Download your free eBook now!

350ztnAuthor Commented:
Attached is pic of error
350ztnAuthor Commented:
picture of NDR. public tools are reflecting the right ip address. A record shows new ip address, and mx shows mail.domainname.us
Simon Butler (Sembee)ConsultantCommented:
I misunderstood - I thought this was inbound email, but it is outbound.

Have you looked at the URL specified in the NDR?
It explains exactly what the problem is. You don't have a PTR record on your external IP address, or if you do it isn't configured correctly.

AOL are very picky about senders have a PTR set correctly.
You need to speak to your new ISP. They need to set the PTR on your external IP address that matches the A record.


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
350ztnAuthor Commented:
Our ISP or godaddy who is used to manage all the DNS records
Simon Butler (Sembee)ConsultantCommented:
ISP. The PTR is set on the IP address. It doesn't matter who your domain is hosted with.

It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.