@MIS Dude: No, DO NOT USE THIS ON VISTA. Microsoft replaced Outlook Express in Vista with a program called Windows Mail.

Thanks for the info. Is this applicable for Vista?

No. This registry only alters what program is used to pen “url:” links. There are several other guides available on the Internet that detail how to reset Outlook to be the default “mailto:” handler. Most boil down to changing the default to something else, saving the setting, then changing it back to Outlook.

I’m having a similar problem with Outlook/Outlook Express, in that mailto links open in Express despite outlook being default. Would running the reg file in the outlook directory solve this issue?