OL2000: How to Activate Diagnostic Logging

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Article ID: 240347 - View products that this article applies to.
This article was previously published under Q240347
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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:
256986 Description of the Microsoft Windows Registry
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To troubleshoot Internet Mail connections it is useful to log certain aspects of the connection. There is no option in Outlook to enable logging for Internet, SMTP, and POP sessions. You can enable logging by editing the Windows Registry.

More information

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.

How To Enable Logging of Internet Mail Sessions

You can enable logging of Internet mail sessions by adding a key to the Windows Registry:
  1. Quit Outlook.
  2. Click Start, click Run, and in the Open box, type regedit, and click OK.
  3. Move to, and click to select the following key:
  4. On the Edit menu, point to New, and then click DWORD Value.
  5. Type the name Logging, and then press ENTER.
  6. In the Value data box, type 1, click OK, and then close the Registry Editor.
  7. Start Outlook to create the logs.
After you establish or attempt to establish an Internet Mail session, three files will be created. The location of these files depends on the operating system you are running.
  • Microsoft Windows 98 and Microsoft Windows Millennium Edition (Me)
    C:\Windows\Temp\Outlook Logging
  • Microsoft Windows NT, Microsoft Windows 2000, and Microsoft Windows XP
    C:\Documents and Settings\username\Local Settings\Temp\Outlook Logging\ProfileName
The files are stored in this folder within a folder that corresponds to the name of the account. There will be a log folder for each account on the computer. The subfolder will contain 3 files for logging various activities:
  • InetXP.txt logs the Internet session
  • Pop3log.txt logs mail-retrieval activity
  • Smtplog.txt logs mail-sending activity


For additional information about interpreting the SMTP and POP3 logs, please click the article numbers below to view the articles in the Microsoft Knowledge Base:
155455 How to Enable and Interpret the Smtp.log File
155515 How to Enable and Interpret the Pop3.log File


Article ID: 240347 - Last Review: October 26, 2013 - Revision: 4.0
Applies to
  • Microsoft Outlook 2000 Standard Edition
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