I installed Thunderbird using the most recent downloader. I logged into my email addresses, but only downloaded a single email. When I open the app, it makes me log into everything from scratch, even though I told it to remember me. I checked, and it's not saving the passwords even if I enter the password and immediately check the saved password list. I am using 2 gmail addresses, and two hosted through inmotion. For the Google accounts, I am making sure to give permission to Thunderbird. One of those two has two-factor authentication, the other doesn't. When I try to import, I get an error. "Authentication failure while connecting to server imap.gmail.com." I tried to change the server to imap.googlemail.com (both as the server name and as the SMTP server) because my wife has hers listed as that, but I get the same error, only it says "imap.googlemail.com" instead. Because it isn't saving passwords, I tried the fix I found elsewhere on this site to delete the directory for your passwords while Thunderbird is closed, and then open it again, and nothing changed. I have tried uninstalling, reinstalling, and logging into only 1 email at a time. Nothing works. I think Thunderbird is just not successfully logging into the accounts, and I don't know what else to try.