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

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

Thunderbird V102 - 1and1 email account setup failing

  • 1 valiny
  • 0 manana an'ity olana ity
  • 1 view
  • Valiny farany nomen'i 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.