To set Mailbird as your default email client:

1) Go to the Mailbird menu in the top left corner of the main window.

2) Select "Settings"

3) Click the "Advanced" tab

4) Check or un-check "Default email application: Tell me if Mailbird is not the default email client"

5) Click the "Set as default" button

Now anytime you click on an email link a compose window will automatically open in Mailbird for you. We've also added MAPI support for Mailbird 2.0, this will enable you to send a file directly through Mailbird.