OLEXP: Outlook Express Does Not Start from the Mail Button in Internet Explorer
This article was previously published under Q277015 For information about the differences between Microsoft Outlook Express and Microsoft Outlook e-mail clients, click the following article number to view the article in the Microsoft Knowledge Base: 257824 (http://support.microsoft.com/kb/257824/EN-US/) OL2000: Differences Between Outlook and Outlook Express 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 (http://support.microsoft.com/kb/256986/EN-US/) Description of the Microsoft Windows Registry
SYMPTOMS
Outlook Express does not start when you click the
Mail button, and then click Read Mail in Microsoft Internet Explorer. Outlook Express is verified as installed and starts from the Run dialog box. Additionally, it may not be listed as an available e-mail program in Internet Explorer's Internet Options.
CAUSE
This behavior can occur because of missing or invalid registry key entries.
RESOLUTIONWARNING: 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. Make sure that the following registry keys are in place and have the correct values. You may need to add them or parts of them. To start Registry Editor, click Start, and then click Run. In the Open box, type regedit, and then click OK. HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Envelope HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Envelope\CLSID Default Value="{A08AF898-C2A3-11d1-BE23-00C04FA31009}" HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Envelope\CurVer Default Value="OutlookExpress.Envelope.1" HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Protocols HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Protocols\mailto Default Value="URL:MailTo Protocol" "EditFlags"=hex:02,00,00,00 "URL Protocol"="" HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Protocols\mailto\DefaultIcon Default Value="C:\PROGRAM FILES\OUTLOOK EXPRESS\MSIMN.EXE,-2" HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Protocols\mailto\shell HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Protocols\mailto\shell\open HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Protocols\mailto\shell\open\command Default Value=""C:\PROGRAM FILES\OUTLOOK EXPRESS\MSIMN.EXE\" /mailurl:%1" HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\shell HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\shell\open HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\shell\open\command Default Value=""C:\PROGRAM FILES\OUTLOOK EXPRESS\MSIMN.EXE\" /mail" APPLIES TO
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