Cannot Forward E-Mail to BlackBerry

[DoubleSh0t]

The company I work for has an Exchange 2003 server. We do not have a BES server. I'm to receive e-mails from work on my BlackBerry, but I've run into some major headaches.

1. I cannot add the address through ATT's BIS page. We are using ISA for OWA, and RIM does not support it (View Document)

2. E-mail forwarding does not work properly. The IT department added a new user "Shawn's Blackberry" with my personal @att.blackberry.com address. Internal e-mail sent to me is received on my BlackBerry without issue. E-mail sent from an external address gets delivered to the Outlook client, but not to the BlackBerry.

External senders also get the following message back:

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

(myaddress)@att.blackberry.net

Reporting-MTA: dns;(exchangeservername).(our internal domain name).com
Received-From-MTA: dns;(our external domain name).com
Arrival-Date: Wed, 25 Feb 2009 14:28:36 -0500

Final-Recipient: rfc822(myaddress)@att.blackberry.net
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;551 This is not a relay host - mail must be to or from host domain.
X-Display-Name: Shawn's Blackberry

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I'm pulling my hair out with this - is there something setup wrong with the Exchange server? From what I understand, this -should- work without issues - all I'm doing is forwarding the e-mail to another address right?

[Zrb0529]

inside mail TO your blackberry works
outside mail TO your blackberry does not work

what does mail FROM your blackberry to inside addresses do?

[DoubleSh0t]

It works fine just like any other external address.

[Zrb0529]

Seems like ISA server is bouncing your emails

Posted from my CrackBerry at wapforums.crackberry.com