For those who don't want to or can't listen to the podcast. I've only listened to about 2 minutes of the relevant part, so I'm certainly no expert.

Paraphrasing; Thunderbird Send is basically a large file sharing service for email. All is encrypted. It's not recommended to send decryption password via the same email as the file, unless it's a cat photo.

Unknowns/questions I have. Possibly answered further in the podcast.

-will file downloads be opt in - especially for unknown senders, but also if I'm on a hotspot, I don't want to accidentally download a large file over data.

-can it send unencrypted files if needed?

-how well does it play with other email clients?

-how long does data remain on the server?

-can I access/view files I've uploaded and delete them at any time?

One red flag from that podcast:

When asked how they might deal with abuse of the service to distribute illegal files, he suggested that you could compare uploaded files to hashes of known files. This doesn't make sense in a system where the server has no knowledge of the unencrypted file, since the same file encrypted with two different passwords will result in two different hashes.

I don't know know if you guys are aware, but a user named timvisee on Github forked Mozilla Send and brought back the service. He even hosts an instance himself, and provides the instructions on how to set it up yourself. Would be cool to see Mozilla bring it back offically in some form though.

Cool. Mozilla Send was really nice.

Awesome. Glad the days are over when important whistleblowers in the white house are using Confide, or some other encrypted bullshit meant for horny young people and like a genuinely professional and email-adjacent encrypted service.

Thundercast is a great listen! Its not all about mozilla stuff either. Mostly a group of thunderbird team members hanging out with a few discussion topics.

Sounds like it will probably be behind a subscription like Firefox Relay and Mozilla VPN, and probably very affordable like those. Server costs and all.

Definitely looking forward to more info about this. I really enjoyed the original send, and solving large files in email without needing to wire up a webDAV drive or go to another service to upload would be awesome. Presumably it'll be thunderbird focused, but hopefully it can be used from a browser extension or web app to use on the go or with webmail clients too.

That's cool! I don't have a chance to listen to the podcast right now, does anyone have more details?

Thundercast assemble!

I am excited for this!