We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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
  • 9 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.