'C:\Program Files\Outlook Express\Msimn.exe' /mailurl:%1 Rundll32.exe C:\Windows\System\Mailnews.dll,Mail_RunDLL On the File Types tab, you'll need to edit the Open event for 'URL:MailTo Protocol.' Sample entries are as follows, for different Microsoft e-mail programs: Email Application In Windows Explorer, choose View | Options.
If you don't see a change, even after restarting Internet Explorer or restarting Windows, then you can make this change manually. Click the top link then find Outlook in the list of programs. On the Programs tab, click Select Programs to open the Set Default Programs dialog. The easiest way to set the program is to use the Internet applet in Control Panel or choose View | Internet Options in Internet Explorer. You'll need to use the 32-bit version of Outlook for the Send to menus to work.
The problem is not that there is no default email client, but that the application can't access the 64-bit version. When you use the 64-bit versions of Outlook 2010 or Outlook 2013, some applications will report that there is no default email client when they try to send email.
