FIX: An outgoing event sink that is registered on the OnBeforeData protocol event is triggered two times on a Windows Server 2003-based computer on which the IIS SMTP service is installed

You have Microsoft Internet Information Services (IIS) Simple Mail Transfer Protocol (SMTP) installed on a Microsoft Windows Server 2003-based computer. However, you notice that an outgoing event sink that is registered on the OnBeforeData protocol event is triggered two times.

This problem occurs if you install the hotfix that is discussed in the following Microsoft Knowledge Base article:

Service pack information

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

Hotfix information

Prerequisites

You must have Microsoft Windows Server 2003 Service Pack 1 (SP1) installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

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 item in Control Panel.

Windows Server 2003, 64-bit Itanium-based versions

Windows Server 2003, 64-bit x64-based versions

Windows Server 2003, 32-bit x86-based versions

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 Windows Server 2003 Service Pack 2.