Microsoft KB Archive/909546

= Mail flow stops when you install the Microsoft POP3 Service on a server that is running Exchange Server 2003 =

Article ID: 909546

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition

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SYMPTOMS
When you install the Microsoft POP3 Service on a server that is running Microsoft Exchange Server 2003, Simple Mail Transfer Protocol (SMTP) mail flow stops for both incoming mail and outgoing mail.

Additionally, the following event may be logged in the Application log: Event Type: Error

Event Source: MSExchangeTransport

Event Category: NDR

Event ID: 3008

Description:

A non-delivery report with a status code of 5.0.0 was generated for recipient rfc822 < >



CAUSE
The Microsoft POP3 Service is a Microsoft Windows Server 2003 service. However, the Microsoft Exchange POP3 Service is an Exchange Server 2003 service. These services conflict with each other.



RESOLUTION
To resolve this problem, use the Add or Remove Programs tool to remove the Microsoft POP3 Service. To do this, follow these steps:
 * 1) Click Start, click Run, type appwiz.cpl, and then click OK.
 * 2) Click Add/Remove Windows Components.
 * 3) In the Windows Components Wizard, click to clear the E-mail Services check box, click Next, and then click Finish.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

320202 How to remove and reinstall IIS and Exchange

Additional query words: XCCC

Keywords: kbpubtypekc kbprb KB909546

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