Find "Email Settings"
Press the Menu key.
Scroll to Messages and press the Navigation key.
Press the Menu key.
Scroll to Options and press the Navigation key.
Scroll to Email Settings and press the Navigation key.
Select default email account
Highlight the drop down list below Message Services and press the Navigation key.
Highlight the required email account and press the Navigation key.
Save and exit
Press the Menu key.
Scroll to Save and press the Navigation key.
Press Disconnect to return to standby mode.