uh. that looks promising! I heard about it but that was a long time ago and I forgot. thanks @sibloure@beehaw.org :)

Well, I don't like TB's RNP implementation, actually requiring you to keep 2 keyrings separately, the GNUPG one (if you do so, which is my case), and then a TB's own DB, which to me is non sense. And that's by design, a choice TB made when integrating PGP support on TB's code.

FYI, there's a Sequoia Octopus implementation which works quite well, though if not integrated with TB on the distribution you use, every time TB gets updated, one needs to go and replace TB's librnp.so with Octopus' one.

Kmail does a much better integration with GNUPG, but it's unfortunate that it has quite some dependencies, plus the whole akonadi stuff. But it already using kde/plasma, and not concerned about whole lot of dependencies, then kmail might be a really good option. The whole suite (kaddressook + kmail + korganizer + ...) is called kontact, and it's part of kde-pim. Korganizer doesn't yet support syncing ics/webcal remote calendars, after all these years, which is really disappointing, but I guess some people don't care.

That said, my current solution is TB + Sequoia Octopus...

This looks interesting as well. Going to check this :) Cheers @Fryboyter@discuss.tchncs.de !

evolution works ok, I just don't like the look and feel. There's a lot of customization possible ... but it's just not for me somehow. so far the thunderbird beta is quite nice.