To change your default mail handler from your existing mail client to Postbox, please follow these steps:
- Select Preferences from the Postbox menu, and click the General tab.
- Under System Defaults, click the Check Now button, and make sure that "Email" is checked.
- Close the Preferences pane.
You can test to see if Postbox is set correctly by clicking on a email link on our contact page. If Postbox comes up instead of Apple Mail, then the handler is working correctly.