I had to change my PW for my Apple email account. When I open Thunderbird v115.8.0 it prompts me to enter the new PW. I do so and Thunderbird just goes into a loop — Wrong PW, Enter New PW, Wrong PW, Enter New PW, etc. Then I remove the email account from Thunderbird and attempt to add it new. I fill out "Setup Your Existing Email Address". Thunderbird then gives me the green dialog, "Configuration found in Mozilla ISP database". I click "Done" and then, "Unable to login at server. Prob wrong config, username, pw". The username and pw are correct. I can add the account just fine on Apple's email client. It seems to me Thunderbird is still "remembering" the old PW and trying to login with it. I did go to Preferences:Passwords to make sure the account and its PW wasn't listed there. A few months ago I noted the exact same behavior with an Outlook account. I finally gave up on trying to use Thunderbird to access that account and am using the Apple email client for it. I much prefer Thunderbird and send my little donation every year, so I hope there is a solution other than completely uninstalling Thunderbird and reinstalling. Any thoughts? Thanks so much.