Exchange Monitoring notification messages may be filtered out by SMTP filtering when the "Blank Sender Filtering" option is turned on (312634)

The information in this article applies to:

Microsoft Exchange 2000 Server, when used with:
- the operating system: Microsoft Windows 2000 SP1
- the operating system: Microsoft Windows 2000 SP2

This article was previously published under Q312634

SYMPTOMS

Exchange Monitoring notification messages may be filtered out by SMTP filtering when the Blank Sender Filtering option is turned on.

CAUSE

The Exchange Monitoring message has an invalid RFC 822 'FROM' address and is seen by the filtering as being blank.

RESOLUTION

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

260910 How to obtain the latest Windows 2000 service pack

The English version of this fix should have the following file attributes or later:

   Date       Time   Version      Size     File name
   ----------------------------------------------------
   12-Feb-02  14:54  1.50.1657.3  159,820  Smtpcons.dll

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 Windows 2000 Service Pack 3.

MORE INFORMATION

Exchange Monitoring uses Windows Management Instrumentation (WMI) to send notification messages. WMI adds 'via WMI auto-mailer' to the 'FROM' address. The final 'FROM' address looks similar to the following address:

WinMGMT@server name via WMI auto-mailer.

Because this is not a valid RFC 822 address, it is ignored.

Modification Type:	Major	Last Reviewed:	10/18/2005
Keywords:	kbHotfixServer kbQFE kbbug kbenv kbfix kbSysAdmin kbWin2000sp3fix KB312634