After having followed the process of creating a gmail account in Thunderbird, the account is visible , including the inbox. However, after trying to create an email I get the message from google that I should set up my browser to allow cookies as the imap server seems not to be reached. I have looked to all te forums and applied all recommendations ( "enable imap", checked all the settings, used Oauth as authentication, enabled cookies on my browser- tried both chrome and firefox, did several restarts,.....). Still does not work. Thanks for helping Rudi