Migadu

+1 for Migadu. Their basic plan (more than enough for most people) is extremely cheap. No vendor lock in. And their support team is by far, the best I’ve encountered.

If you’re using a custom domain, don’t use Mailbox.org, see below:

https://userforum-en.mailbox.org/topic/anti-spoofing-for-custom-domains-spf-dkim-dmarc#comment-1524

Codeberg for public repositories, cgit (if that even counts) on my own server for private ones

I’m not a fan of GrapheneOS, but the point they bring up here is valid. There is already proprietary firmware on your computer. There’s no reason why you shouldn’t be updating it to protect yourself from serious exploits. The FSF takes an ideological stance rather than a practical one, unfortunately.