You can configure your Yahoo Mail account as an IMAP or POP3 account in the Mailbird app. If Mailbird displays the Server Authentication Failed message, troubleshoot it with the quick steps given on this page. In most cases, the authentication failed error message occurs when the email server is down. You have to reauthenticate your email account to fix this problem. Sometimes, users may configure the server settings incorrectly and end up with a server authentication error. In such cases, contact our technical experts to assist you
in resolving Mailbird Yahoo server authentication failed.