Yahoo - Incorrect username or password – Mailbird
support.getmailbird.com › hc › en-usSep 16, 2021 · In general, if you are unable to authenticate your Yahoo email account using your username and password, we would always suggest first making absolutely certain that both your Yahoo username and Yahoo password are being inputted correctly. The message you are seeing should state the following: [AUTHENTICATIONFAILED] AUTHENTICATE Invalid credentials