Mozilla Thunderbird Login to Server Failed Depending on your version, you may have to use the incoming IMAP server hostname “” or “” and the outgoing SMTP server hostname “” or .” This is because AT&T mail is based on Yahoo. You may have to double-check your credentials to ensure a successful login. Login to server failure is usually caused by wrong credentials, which may occur depending on the version of Mozilla Thunderbird you installed or if you’ve entered the wrong credentials. If that’s you, follow the next step to solve the issue. However, there are chances that you may be faced with the “Thunderbird login to server failed” issue. Port numbers: 587/465 Encryption: TLS/SSLĪfter you have entered all the configurations as shown above, click on “Create Account.”īy using the credentials above, you should enjoy a successful Thunderbird login to Yahoo Mail. Check if the outgoing mail server configuration is rightly inputted as follows:.Incoming mail server: Port numbers: 995 Encryption: SSL If you choose the POP3 account configuration, enter the following details:.Incoming mail server: Port number: 993 Encryption: SSL If you choose the IMAP account configuration, enter the following details:.In the “Mail Account Setup,” choose either IMAP or POP3 as the incoming mail configuration.Enter your Yahoo email ID and password.Open the Thunderbird program on your desktop.How to Configure Yahoo Email Settings in your Mozilla Thunderbird? Here is a detailed instruction on how to configure your Mozilla Thunderbird for Yahoo Email.
Have you configured your Mozilla Thunderbird with the Yahoo email settings to the best of your knowledge but still experiencing the “Thunderbird login to server failed” issue? This post will help you out.Īfter reading this post, you’ll understand how to properly configure Yahoo email settings in your Mozilla Thunderbird and also eliminate the issue of “Thunderbird login to server failed.” Read on.
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