Yes, it’s just sway

I’d go for Alpine Linux in such case.

You may want to check out numen, targeted towards power-users.

I’ve been self-hosting e-mail for over 15 years and hope to continue doing so. Although it’s being made increasingly difficult by big tech players. I wrote about it here: https://proycon.anaproy.nl/posts/rant-against-centralising-e-mail/