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Thunderbird V102 - 1and1 email account setup failing

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  • Last reply by david

roger28
roger28
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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
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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.