i recently bought a macbook pro and i synced my gmail account with the mail app and whenever i go to delete my messages from my account they all show back up in my inbox the next time i get on the mail app, does anyone have a solution to this?
The key setting is to check/enable Preferences -> Accounts -> [Gmail Account] -> Mailbox Behaviors -> "Move deleted messages to the Trash mailbox"
I don't think this is enabled by default, which means when you hit "delete" it is actually archiving the email in your "All Mail" folder instead of actually moving it into the trash.