I plan on using proton until I hate myself enough to run my own email server
I've enjoyed using proton for my own domain. Adding another 2-3 domains and a second user raises the cost to the point that I just can't justify. ~$200 up front for two years.
By definition an email server is not under your control, so the question of whether or not it runs FOSS is a bit moot and in any case impossible to verify.
In terms of privacy-respecting email hosting, Proton, Posteo, and Mailbox all spring to mind.
Exactly this. Services and software are not the same thing, you're asking for a service recommendation and it can't be open-source software because it's not software.
"Graphic design is my passion"
It’s not completely FOSS, but I run Port87, which is quite a bit FOSS. It uses Haraka as its SMTP server, SvelteKit as its server framework, Nymph.js as its database layer, Svelte as its frontend framework, and Svelte Material UI as its UI framework.
The ones that I created and maintain are:
The base app layout is also available on GitHub.
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
