Can't delevier mail to company use to host on exchange

My exchange server 2003 use to host @abc.com this has since become it's own company nd has its own e-mail server which they have no issues with
When some one in my company @123.com sends and e-mail to abc.com they get  

Your message did not reach some or all of the intended recipients.

      Subject:      the great one
      Sent:      3/23/2007 9:09 AM

The following recipient(s) could not be reached:

      jojo@abc.com on 3/23/2007 9:09 AM
            The e-mail account does not exist at the organization this message was sent to.  Check the e-mail address, or contact the recipient directly to find out the correct address.
            <MAIL.123.com #5.1.1>

We can recieve mail from @abc.com and get same message when we reply
We can send a to anyone in abc.com for yahoo, hotmail etc

I have removed abc.com form DNS and exchange server once they started hosting there own mail

This is becoming a real issue as we need to send a lot of mails between the two companies

Help

thanks
Liam_CloakeAsked:
Who is Participating?

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

x
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.

MATTHEW_LCommented:
You probably still have a recipiant policy on your Exchange server for abc.com, which would prevent it from being delivered correctly.

If that is not it, do an nslookup for abc.com

also

nslookup
set type=mx
abc.com

make sure those are valid mail servers, hopefully their mailservers and not yours etc.  Post back the results.
0

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
Liam_CloakeAuthor Commented:
In recipiant policy there is no trace of abc.com only 123.com, 123.ie
also nslookup the Mx records for both are completelly diffrent abc.com is pointing to the correct server works fine for everyone outside of 123.com

thanks

Liam
0
MATTHEW_LCommented:
Is there a possibility that somewhere in your organization you still have a user with an SMTP address of @abc.com?  Try doing a search in AD for that and see if you have any users, if so remove that SMTP address.
0
MATTHEW_LCommented:
Did you find a user with an outdated SMTP address of the other company?
0
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
Active Directory

From novice to tech pro — start learning today.