Thunderbird 78 rolls out with various UI redesigns, including a much improved dark mode. Also, integrated PGP / GPG support.
The DKIM Verifier extension is currently broken, but the author is working on it.
Conversations works, but the message display doesn't honor the dark skin.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!