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Installing older version on windows 11

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  • Last reply by sfhowes

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My father likes an older version of Thunderbird (like 78.5.0 or earlier). Is there anything that will prevent it from running on Windows 11? I double-checked all the Optonlie.net email settings and they are correct but it keeps saying that there is something wrong with the user name, address, or password when I try and install it on his new Windows 11 computer.

My father likes an older version of Thunderbird (like 78.5.0 or earlier). Is there anything that will prevent it from running on Windows 11? I double-checked all the Optonlie.net email settings and they are correct but it keeps saying that there is something wrong with the user name, address, or password when I try and install it on his new Windows 11 computer.

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Post the settings you've tried. Check that the User Name is the part of the address before @.

https://faq.optimum.net/node/7327