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Outlook Express missing from the Internet Options mail clients list

Published: June 2004
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msoe_missing.JPG (25994 bytes)

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:

Method 1

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.

Method 2

Follow the solution given in the Microsoft Knowledgebase article:

OLEXP: Outlook Express Does Not Start from the Mail Button in Internet Explorer

Once you completed any of these methods, select Outlook Express as the default mail client (from Internet Options, Programs tab) and click Apply.