Links send by email go 401

Links you send by email don’t work

¡ Hello @johannes1 !

perhaps you could describe a little better what your problem is? so I can guide you through the process.

Att: Ian Restrepo | Moz://a collaborator

Me too!
Plus emails take 5 minutes to arrive so it’s too easy to be doing something else and miss the timeslot.
And I’ve gone round in circles trying to get help - I don’t want a Firefox account (or whatever account I’ve just signed up to) to resolve a Thunderbird problem.
And latest upgrade to TB102 has disappeared my Sent folder, my Templates folder and too many of my Local folders. How can I get back to normality?