Set up Passband

• Read (gmail.readonly): mail triage.
• Change (gmail.modify): archiving and labeling, never deletion.
• Send (gmail.send): replying from the app.

Passband needs all three, so keep those boxes checked. It also asks for your name and profile photo, to show them in the app; that one is optional. Your Google refresh token is stored encrypted so mail keeps syncing; self-host to hold it yourself.