Account
Create an account with a password
Choose a password for the address you sign in with. A link is sent to the address first, to prove it is yours; the password takes hold only once the link is used, on an account the link creates.
Choose a password
By creating an account, you agree to the Terms of Service. The Privacy page and the Cookie Policy say what is kept.
If the address already has an account, the link only signs in to it, and its password stays as it is. Nobody can set a password on an address but whoever reads its mail.