"Saved Passwords" - Thunderbird
Issue began Monday 7/1 where Thunderbird would not receive new email from AOL. At times it would tell me to enter the password. But the p/w I entered was not correct so that made situation worse. Found "Saved Passwords" in Help->Settings where I was able to retrieve the -correct- p/w for one of the email addresses being actively used in Thunderbird and problem solved. When I went to find the correct p/w for the other email address, the account in "Saved Logins" was not there?? Was odd that the list did display email accounts I haven't used in years, but not the 2nd one that I use daily! I tried changing the p/w at AOL Mail, but that didn't work for either of my two accounts. Bottom line, why isn't lf82me@verizon.net showing up in the "Saved Passwords" in Settings?
Alla svar (1)
There are many reasons, but in your case most likely it has failed sufficient times for you to be asked for a new password and you to cancel the prompt.
Fundamentally my understanding of the Verizon email mess is that AOL now require the use of application passwords for those old verizon addresses. You can find out how to create one on the AOL web site. You use an app password as a replacement for your "password" in the application it is created for.
See https://help.aol.com/articles/Create-and-manage-app-password