Ah, sorry you're having issues, that's frustrating. Graph API support for Exchange/Microsoft 365 is actively in development right now, so we're hard at work on this. If you'd like to get a hand from support in the meantime, you can reach us here:
https://support.mozilla.org/questions/new/thunderbird/form

@nprofile1q... We're so happy you're enjoying it so far!!

One of our design team created a cheerful gif perfect for our sunny new Extended Support Release!

Thanks for the shout out! We're happy you're enjoying it so far 🙂

@nprofile1q... It sounds like you're maybe wanting to do some development? In that case you might want to have a look at our repository: https://github.com/thunderbird/mailstrom - or if there was something else you'd like to do, just let us know and we'll get you pointed to the right place.

Great question! We definitely have a shared value in privacy, but for more details on what features are included with Thundermail, check out https://tb.pro for the breakdown.

@nprofile1q... Not yet, but we do have a suggestion at Mozilla Connect you can vote form, comment on, and follow! https://connect.mozilla.org/t5/ideas/allow-thunderbird-user-to-enable-disable-an-account-temporarily/idi-p/29194

@nprofile1q... Sorry for any confusion! Shaping direction means suggesting features and giving feedback on design and workflow. We're firmly committed to supporting IMAP/SMTP, as well as JMAP. We hope this helps clear things up, and if you're interested in being part of Thundermail from the start, please sign up for the waitlist!

@nprofile1q... No, we're not supporting POP3 with Thundermail, but we have an open Idea about this that you can definitely upvote, comment on, and follow for status updates: https://ideas.tb.pro/p/gmail-is-ending-pop3-support-you-guys-need-to-get-this-done