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

Wo archive tread sia. Meɖekuku bia biabia yeye ne ehia kpeɖeŋu.

Thunderbird V102 - 1and1 email account setup failing

  • 1 ŋuɖoɖo
  • 0 masɔmasɔ sia le wosi
  • 1 view
  • Nuɖoɖo mlɔetɔ david

roger28
roger28
more options

I've run Thunderbird as my 1and1 email client for decades. I'm trying to setup a new Thunderbird V102 program with my 1and1 email account on a new Windows 11 laptop. I've completed the account setup with my name, email address and password, which it accepts. But then it shows the available configuration as IMAP with a warning that there's no encryption. I press the DONE button, but it then says "Unable to log in at server. Probably wrong configuration, username or password". But I know my username and password are correct, having tested them via 1and1. Any ideas about configuration please? I also understood that 1and 1 had encryption.

I've run Thunderbird as my 1and1 email client for decades. I'm trying to setup a new Thunderbird V102 program with my 1and1 email account on a new Windows 11 laptop. I've completed the account setup with my name, email address and password, which it accepts. But then it shows the available configuration as IMAP with a warning that there's no encryption. I press the DONE button, but it then says "Unable to log in at server. Probably wrong configuration, username or password". But I know my username and password are correct, having tested them via 1and1. Any ideas about configuration please? I also understood that 1and 1 had encryption.

All Replies (1)

david
david
  • Top 10 Contributor
more options

I think 1and1 requires port 993 for incoming and 587 for outgoing and SSL for both. if you post a screenshot of your server settings for input and output, I'm sure someone here can give more info. Thanks.