I was having trouble adding my NYU email account to Thunderbird and browsing the forums I found this [https://support.mozilla.org/ml/questions/1444845 post] with my exact same issue. I just wanted to open a thread because I found a solution to my problem by following one the comments in the original post. The configuration you should use to configure the account should be as follows (as of Nov. 2024), Incoming server: imap.gmail.com on port 993 with SSL/TLS using OAuth2 Incoming server username: your NetID without the trailing "@nyu.edu". Outgoing server: smtp.gmail.com on port 465 with SSL/TLS using OAuth2 Outcoming server username: your NetID (as before) Once you input this configuration you will be asked to log-in through Google, and from there on everything should work as intended. Hope this wil be useful to someone.