Hello, I try to set up Thunderbird with my @gmail.com account. So I choose "New account" and fill the form with full name, Email address and Password. I see a green message: Configuration found in Mozilla ISP database. Now it shows me: Available configurations Keep your folders and emails synced on your server Incoming IMAPimap.gmail.comSSL/TLS Outgoing SMTPsmtp.gmail.comSSL/TLS Username "[email protected]" So I click on "Done" and a window pops up "Sign in with your Google Account" So there I enter my email and my password and then click "Sign In'. Now it shows me a number and sends me a message to my phone where I have to confirm that it's me trying to connect and shows me 3 random numbers. I have to click on the number on my phone that is shown in the popup. Now I click a button and a window opens, where I have to confirm permissions. So I click on "Allow" and the popup disappears. Then back in Thunderbird I click on "Done". Now the same popup shows up again and I have to do all steps done just now again Email, Password, Phone confirm. Now I see the following message in Thunderbird: Unable to log in at server. Probably wrong configuration, username or password. So I tried Configure manually, where I see all the following information: Incoming server Protocol: IMAP Hostname: imap.gmail.com Port: 993 Connection security: SSL/TLS Authentication method: OAuth2 Username: "[email protected]" Outgoing server Hostname: smtp.gmail.com Port: 465 Connection security: SSL/TLS Authentication method: OAuth2 Username: "[email protected]" Then I click "Done", again popup, again sign in, again confirm with phone with the same result: Unable to log in at server. Probably wrong configuration, username or password. Sorry for a very detailed description, but I wanted to give all necessary information. Can anybody help me here? I tried all these steps many times.