To set Thunderbird as your default mail client in Microsoft Word:
- Go to the Start menu and select the Control Panel.
- Double-click on the Add or Remove Programs option and then choose Set Program Access and Defaults on the left side of the box.
- Click on Custom and then click on the arrows icon (two arrows pointing down on the right side of the box). Under Choose a default email program, select Thunderbird and click OK.
Thanks to Nicole Ortmann, E-Mail Migration Assistant of I-Tech, for submitting this tip!