The client keeps asking.
WHAT IT USUALLY MEANS
Authentication is failing repeatedly.
WHAT TO CHECK
That the password is correct, by logging into webmail That the username is the full address That the stored password is not out of date
THE OUT-OF-DATE PASSWORD
If the password was changed, every device needs updating.
A device still using the old one prompts repeatedly and may trigger a block.
THE BLOCKING CONSEQUENCE
Repeated failures from one address can block it temporarily.
That affects your other devices on the same connection.
WHAT TO DO
Update every device when you change a mailbox password.
Including ones you rarely use.
WHAT ELSE CAUSES IT
Outgoing authentication configured separately and not updated A saved credential in the operating system's keychain
WHAT TO TRY
Remove the account and add it again with correct settings.
WHAT TO CHECK
Whether the prompt is for incoming or outgoing.
They are configured separately.
