Here are the suggested steps to change your default email program:

1. Go to your device's main settings, then select 'Apps & Notifications'.
2. Tap 'Default Apps'.
3. Select 'Email' – this may be listed as 'Email App' or 'Mail'.
4. You will be presented with a list of email programs. To change the default program, select the one of your choice from the list.
5. Your new default email program should now be implemented.