A Non-Delivery Report (NDR) is generated when an Exchange Server 2007 user tries to send a message to a recipient who has a one-off FAX address that includes any characters that are larger than 0xFF in Unicode

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SYMPTOMS

When a Microsoft Exchange Server 2007 user tries to send a message to a recipient who has a one-off FAX address, and there are certain language characters (for example, Arabic characters) in the address, a Non-Delivery Report (NDR) is generated that resembles the following:

From: Microsoft Exchange
To: <FAX address that includes Arabic characters>
Sent: <Date, Time>
Subject: Undeliverable: <subject>

Delivery has failed to these recipients or distribution lists:

'<FAX address that includes Arabic characters>'
The format of the recipient's e-mail address isn't valid. 
A valid address looks like this: username@contoso.com. 
Microsoft Exchange will not try to redeliver this message for you. 
Please check the e-mail address and try sending the message again, 
or provide the following diagnostic text to your system administrator.
  _____  

Sent by Microsoft Exchange Server 2007 

Diagnostic information for administrators:

Generating server: <Exchange Server name>
<FAX address that includes Arabic characters>
#550 5.1.3 STOREDRV.Submit; invalid recipient address #FAX#

<Original message headers>

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CAUSE

In this scenario, Exchange Server 2007 did not support those languages that had characters that are larger than 0xFF in Unicode.

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RESOLUTION

To resolve this problem, install Update Rollup 7 for Exchange Server 2007 Service Pack 1. For more information about Update Rollup 7 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic:

Description of Update Rollup 7 for Exchange Server 2007 Service Pack 1 (http://go.microsoft.com/fwlink/?LinkId=157083)

For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:

How to Obtain the Latest Service Pack or Update Rollup for Exchange 2007 (http://go.microsoft.com/fwlink/?LinkId=152570)

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