Outlook Express missing from the Internet Options mail clients listPublished: June 2004
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When you open Internet Options Programs tab, Outlook Express may not be listed in the drop-down. Also, Outlook Express Does Not Start from the Mail Button in Internet Explorer. This is caused if the following key/sub-keys or it's (default) value is missing in the registry:
HKEY_LOCAL_MACHINE \ Software \ Clients \ Mail \ Outlook Express
To resolve the problem, follow any of the methods:
Click Start, Run and type the following commands one by one:
- "%programfiles%\Outlook Express\msimn.exe" /reg
- regsvr32 "%ProgramFiles%\Outlook Express\msoe.dll"
This restores Outlook Express under the email clients list. The above-said registry key is now recreated. The second command registers the DLL Path for Outlook Express, as it's a requirement for MAPI calls.
Follow the solution given in the Microsoft Knowledgebase article:
Once you completed any of these methods, select Outlook Express as the default mail client (from Internet Options, Programs tab) and click Apply.