Article ID: 265139 - View products that this article applies to.
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Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows Registry
This article discusses how to install and enable Simple Mail Transfer Protocol (SMTP) protocol logging in Microsoft Exchange 2000 Server and in Microsoft Exchange Server 2003.
Description of the Protolog.dll fileThe Protolog.dll file is a protocol sink that can log SMTP errors, including Xexch50, Exps, and X-Linkstate2 errors, to the application event log. Because the logs are actually events, you are only required to open the application event log to see the protocol level logs that this sink generates.
Installing SMTP protocol logging
Exchange 2000To install SMTP protocol logging on an Exchange 2000 computer, you must copy the Protolog.dll file to the Program Files\Exchsrvr\Bin folder and then register the .dll file. This procedure registers the Component Object Model (COM) object, and also binds the sink to all existing SMTP virtual servers in the metabase.
The Protolog.dll file is not included with Exchange 2000. To obtain the Protolog.dll file, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMSTo register the .dll file, copy the Protolog.dll file to the Exchsrvr\Bin folder and then run the following command at a command prompt:
regsvr32 protolog.dllNote You must restart the Internet Information Services (IIS) Admin service for the sink to work correctly.
To unregister the Protolog.dll file, run the following command at a command prompt:
regsvr32 /u protolog.dllNote If you create a new virtual server after you register the .dll file, you must re-register the Protolog.dll file for the sink to work on that virtual server.
Exchange 2003The Protolog.dll file is installed and registered with Exchange 2003. The file is located in the Exchsrvr\Bin folder.
Available logging levels
Setting the logging levelTo set the logging level, follow these steps:
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
Article ID: 265139 - Last Review: October 25, 2007 - Revision: 3.3