Just as Windows comes with Outlook installed Macs come with their own default Email application called Mail, and if you use GoToMeeting or GoToWebinar on a Mac they will open Mail by default when scheduling. If Mail is not your application of choice and you prefer to use Entourage or Thunderbird, follow these steps to banish that pesky Mail!
If you have never set up Mail on your Mac you will need to do this first as you cannot access the Preferences other wise. Don’t worry it only takes a moment to set up a fake account, just follow the sets in these pictures and ignore any error messages you see.
Now that you have a Mail account created, you will be able to access the Preferences and then change the Default Email Reader to the application of your choice.