Looking for logging into the Google Account Thunderbird site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Google Account Thunderbird site. After that you can login as usual with your login credentials.
https://support.mozilla.org/de/kb/thunderbird-und-gmail
https://support.mozilla.org/questions/1201406
https://support.mozilla.org/questions/1204863
https://support.mozilla.org/en-US/kb/thunderbird-and-gmail
https://www.pctipp.ch/tipps-tricks/kummerkasten/internet/artikel/wenn-thunderbird-den-gmail-zugriff-verweigert-85247/?forcedesktop=1
https://www.thunderbird-mail.de/forum/thread/76393-anmeldung-mit-gmail-nicht-mehr-m%C3%B6glich-seit-umstellung-auf-neuen-login/
https://productforums.google.com/forum/#!msg/gmail/H5m8ntY40n0/T4JGUjJZAAAJ
https://productforums.google.com/forum/m/#!msg/gmail/H5m8ntY40n0/UOxe80ONAAAJ
https://www.lifewire.com/gmail-access-thunderbird-1173150
http://kb.mozillazine.org/Using_Gmail_with_Thunderbird_and_Mozilla_Suite
https://support.google.com/mail/answer/78892?hl=de
https://support.google.com/accounts/answer/6010255?hl=de
https://www.ameslab.gov/operations/faq/how-set-thunderbird-work-g-suite/gmail