This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Authentication failure while connecting to server

  • 1 reply
  • 3 have this problem
  • 22 views
  • Last reply by david

Tom
Tom
more options

bold textWhen I try to open Thunderbird I see a message saying " authentication failure while connecting to server "

'''bold text'''When I try to open Thunderbird I see a message saying " authentication failure while connecting to server "

All Replies (1)

david
david
  • Top 10 Contributor
more options

Sometimes trying different authentication settings resolves it. Posting your settings here may help, or contact your email provider to verify you have the right settings.