Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

What does 5.7.1 authorization required mean?

  • 1 vastus
  • 21 on selline probleem
  • 48 views
  • Viimati vastas Matt

more options

When I try to answer e-mail since this afternoon I get the message 5.7.1 Authorization required and my answer won't send. What can I do? I can send e-mail responses if I use my e-mail address directly (not using Thunderbird)

When I try to answer e-mail since this afternoon I get the message 5.7.1 Authorization required and my answer won't send. What can I do? I can send e-mail responses if I use my e-mail address directly (not using Thunderbird)

All Replies (1)

more options

I5t sounds like your account settings have been changed by your mail provider, and they perhaps forgot to tell you the new settings.

Have a look at Tools menu (alt+t) > account settings > outgoing server (SMTP) and check your settings are as described by your mail provider, particularly the password and SSL settings.