The bird is out of the bag! We're introducing Thunderbird Pro (you already know Appointment!), a set of productivity AND privacy boosting services. And that includes...*drum roll*...an email service we're calling Thundermail. Find all the info in this excellent article:
@thunderbird Does Thunderbird Pro come with a working search feature? Because that'd be a welcome improvement I would pay for.
@nw @thunderbird well, there are some really neat RAG search features that we've been playing around with. Hopefully those will make it into TB soon-ish.