Article ID: 325797 - Last Review: October 27, 2006 - Revision: 3.1

The SMTP service may leak domain list memory when you use the Pickup folder

View products that this article applies to.

This article was previously published under Q325797

SYMPTOMS

When you send a lot of mail by using the Pickup folder with the Windows 2000 Simple Mail Transfer Protocol (SMTP) service, memory usage may increase over time without ever decreasing.

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CAUSE

Memory is allocated for a domain entry but is never released for each unique domain to which a message is sent.

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RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 (http://support.microsoft.com/kb/260910/ ) How to obtain the latest Windows 2000 service pack

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Hotfix information

To resolve this problem, install hotfix 910932. For more information about hotfix 910932, click the following article number to view the article in the Microsoft Knowledge Base:

910932 (http://support.microsoft.com/kb/910932/ ) Memory usage may increase over time when a computer that is running Windows Server 2003 uses the SMTP service to process many outgoing messages

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WORKAROUND

Start Registry Editor (Regedt32.exe).
Locate and then click the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SMTPSVC\Queuing
On the Edit menu, click Add Value, and then add the following registry value:
Value name: ZombieDomainEntryThreshold
Data type: DWORD
Value data: 0000003E8
Quit Registry Editor.

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows 2000 Service Pack 4.

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