Article ID: 940051 - Last Review: January 30, 2008 - Revision: 3.2

The recipient information in an e-mail message incorrectly contains the character string "%40" in the address instead of the at sign (@) in Exchange Server 2007

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SYMPTOMS

In Microsoft Exchange Server 2007, you send an e-mail message that has the Request a Delivery Receipt option enabled. When you do this, the recipient information in the body of the message incorrectly contains the character string "%40" in the address instead of the at sign (@).

Additionally, you may receive a delivery status notification (DSN) message that resembles the following DSN message:
Your message has been delivered to the following recipients:
user01<mailto:user01%40contoso.com>

Subject: xxxx ------------------------------------------------------------------------------------------------

Sent by Microsoft Exchange Server 2007
Note In this example, the recipient address should be "user01@contoso.com."

CAUSE

This problem occurs if you change the settings of the Exchange Server 2007 transport server to send a DSN message in plain text format. When you do this, the transport server generates a plain text DSN message that treats the at sign (@) as an escape character. Therefore, the at sign is replaced by the character string "%40."

RESOLUTION

Service pack information

Exchange Server 2007 Service Pack 1 (SP1) was released on November 29, 2007.

To obtain Exchange Server 2007 Service Pack 1 (SP1), visit the following Microsoft Web site:
http://www.microsoft.com/downloads/details.aspx?FamilyId=44C66AD6-F185-4A1D-A9AB-473C1188954C (http://www.microsoft.com/downloads/details.aspx?FamilyId=44C66AD6-F185-4A1D-A9AB-473C1188954C)

Update Rollup information

To resolve this problem, install Update Rollup 5 for Exchange Server 2007. For more information about Update Rollup 5 for Exchange Server 2007, see the following Exchange Help topic:
Description of Update Rollup 5 for Exchange Server 2007 (http://go.microsoft.com/fwlink/?LinkId=152562)
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)

STATUS

This problem was first corrected in Exchange Server 2007 Service Pack 1.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

To send a DSN message in plain text format, run the following command in the Exchange Management Shell:
Set-TransportServer -Identity server name -InternalDsnSendHtml: $false
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
824684  (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates
817903  (http://support.microsoft.com/kb/817903/ ) New naming schema for Exchange Server software update packages

APPLIES TO
  • Microsoft Exchange Server 2007 Standard Edition
  • Microsoft Exchange Server 2007 Enterprise Edition
Keywords: 
kbexpertiseinter kbqfe KB940051