Individual Ring Tone for android thunderbird

There's a number of routes to set the ring tone. '''via Thunderbird app settings''' 1a. Nagivate to settings > account > notifications 1b. Click new mail ringtone. Assign a tone 2a. Nagivate to settings > account > notifications 2b. Click "messages" under ''Notification Categories'' header 2c. Click "ring" and choose a tone '''via Android settings''' 3a. Navigate to Android settings > apps 3b. Click Thunderbird app 3c. Click manage notifications 3d. Click "messages" under email account header 3e. Click "Ring" and assign a tone.