I learned about this book written by Adam who founded the SeaGL conference.

https://selfhostbook.com/

I’ve been self hosting for years and bought it to support him. I like the style of writing and how he explains the concepts.

catch-all addresses just work with correct from address when replying

What do you mean by this? I’d like to be able to reply from a website@mydomain.com automatically.

For me Thunderbird makes me create an alias in order to reply to my catch all (*@mydomain.com). Did you have to configure something specifically?