Password changed
You're signed out everywhere. Log in with the new password. Older mail opens again when you enter your recovery code in Settings.
Your recovery code
With it you can reset your password and keep all your mail. We can't show it again.
Save it or copy it first.
Reset your password
A reset by email makes a new key. Older mail opens again when you find your code.
Password changed
All your mail is still readable. You're signed out everywhere; log in with the new password.