Microsoft KB Archive/873438

= When the front-end server is under a heavy load, the POP3 service or the IMAP4 service stops responding in Exchange 2000 or in Exchange 2003 =

Article ID: 873438

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Enterprise Edition
 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange 2000 Server Standard Edition

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SYMPTOMS
You are using a configuration that has a front-end server and a back-end server. When the front-end server is under a heavy load, the POP3 virtual server or the IMAP4 virtual server encounters a deadlock in the front-end server. Then, the POP3 service or the IMAP4 service stops responding.



Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Exchange Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

836993 How to obtain the latest service packs for Exchange Server 2003

Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange 2000 Server service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version            Size    File name --  27-Dec-2004  06:41  6.0.6617.34        32,768  Iisif.dll 27-Dec-2004 06:42  6.0.6617.34       131,072  Imap4fe.dll 26-Dec-2004 14:42  6.0.6617.34       126,976  Imap4svc.dll 27-Dec-2004 06:42  6.0.6617.34        24,576  Pop3fe.dll 27-Dec-2004 06:42  6.0.6617.34        73,728  Pop3svc.dll Note Because of file dependencies, this software update requires Microsoft Exchange 2000 Server Service Pack 3 (SP3).

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

301378 How to obtain the latest Exchange 2000 Server service pack



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

This problem was first corrected in Microsoft Exchange Server 2003 Service Pack 2.

Additional query words: XCON

Keywords: kbqfe kbhotfixserver kbexchpopimapnntp kbfix kbexchange2000presp4fix kbbug kbpubtypekc KB873438

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