Dealing with the Yahoo server authentication failure issue in Mailbird can be frustrating but do not worry about it. The issue can be sorted out by the quick and simple steps provided on this page. Go through the steps and execute them.
Why do you see Yahoo server authentication failed error in Mailbird?
There are many reasons which can make the application cease to work. Sometimes the antivirus or firewall on your system can also be a reason for such an issue. Otherwise, it may be an outdated application or server issue or even an unstable network connection issue. Try to refresh your Yahoo Mail account or you can also restart your computer. Now open the application and enter your valid username and password in their respective fields. If you still encounter a similar problem, then carry on to the troubleshooting steps.
Method 1: Refresh your account
If you still experience the server authentication failed issue, then continue with the following method.
Method 2: Try another browser
The problem might be with the email server or the server settings or any other Internet glitch in the Mailbird app. Sometimes, this error occurs when Mailbird is not allowed to access your email account. Try to log in to your Yahoo account from a different browser. This may resolve the issue. If the problem persists, then carry on with the following step.
Method 3: Disable the security features
Check whether the authentication problem is fixed. If the issue persists, contact our technical team for further assistance.