Out Bound e-mail getting rejected, delayed or never recieved

I have had the this issue for a while and it seems that I have outbound e-mail that is not getting to its destination e-mail servers.  I run Exchange 2003 and sends e-amil SMTP outbound.  I do have external e-mail that is POP'd in to my e-mail clients, so the outbound ip address is my firewall and mail.company.com is my external provider.


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

      Subject:      PTR record addition
      Sent:      1/25/2005 9:45 AM

The following recipient(s) could not be reached:

      dns-admin@qwest.ip.net on 1/25/2005 9:46 AM
            The destination server for this recipient could not be found in Domain Name Service (DNS).  Please verify the email address and retry.  If that fails, contact your administrator.
            <Servername.mycompany.com #5.4.0>


Thanks to anyone who can help me out.  I hope this is concise and enough info for a solution or answer.

Dave
frugedlAsked:
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_ruudsje_Commented:
Looks like e-mail address is not correct, I also tried to sent an e-mail to that user:

it's dutch
---------------
Uw bericht heeft enkele of alle geadresseerden niet bereikt.

      Onderwerp:      test
      Verzonden:      24-2-2005 21:04

De volgende geadresseerde(n) zijn niet bereikt:

      'dns-admin@qwest.ip.net' op 24-2-2005 21:04
            De doelserver voor deze geadresseerde bevindt zich niet in de DNS (Domain Name Service). Controleer het e-mailadres en probeer het opnieuw. Als ook deze poging mislukt, neemt u contact met de beheerder.
            <domain.com #5.4.0>
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