arch

You mean Etesync? Yes, it’s fully open source and self hostable

Mailbox and posteo are not fully open source afaik

great news. love the project

If main focus is deliverability and encryption plus privacy

You can try with mailbox or posteo with email, and self host etesync for calendar

sooo cute curl

I would say Fedora workstation if you hate the idea of getting arch-like distros but Manjaro if you just dislike the daunting procedures to get your arch work