Solved: Thunderbird Email Error 5.7.1

Thunderbird Email Error 5.7.1

The error 5.7.1 is an SMTP error that occurs in the Thunderbird email client when authentication is required to send emails for better protection. The error occurs, followed by the message as relaying denied. If you receive the relaying prohibited error, it means that the outgoing mail server couldn’t authenticate you as a legitimate user. You may receive the error when you are trying to send an email message to a recipient outside of your domain. Let’s see how to fix Thunderbird email error 5.7.1 using the steps that are given below.

  • Step 1: Verify your mail server settings whether you have entered the details correctly.
  • Step 2:Open the Mozilla Thunderbird email client and go to the Tools menu.
  • Step 3:Click the Account Settings option and navigate to the Outgoing Server tab.
  • Step 4:Select the SMTP server and click on the Edit button.
  • Step 5:Type the username and enter the correct outgoing server address.
  • Step 6:Select the checkbox to enable SMTP authentication and save the settings.
  • Step 7:If you have added your ISP as an email provider and logged into Thunderbird from some other network, you may receive the error.
  • Step 8:To resolve the issue, you can use a VPN to connect to the SMTP server.
  • Step 9:If the issue persists, you can reconfigure your email account.
  • Step 10:Now, you have seen how to fix Thunderbird email error 5.7.1 that occurs due to the SMTP authentication issue.

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