Outlook Express

(redirected from Msimn)
Also found in: Acronyms.

Outlook Express

A lite version of the Outlook mail client that was included with Windows for many years. See Outlook.
References in periodicals archive ?
QMY system crashed recently and when I got it restarted it was giving an error message when I tried to launch Outlook Express: "Msimn..
Q WHEN I try to use Outlook Express, I get a message that says C:Program Files Outlook Express msimn.exe is not a valid Win32 application.
If not, right-click the desktop, choose New, then Shortcut, and browse for the file called msimn which should be in your Program Files\OE folder.