Ars wrote a pretty good series about self-hosting emails back in (gasp!) 2014: https://arstechnica.com/information-technology/2014/02/how-to-run-your-own-e-mail

Ars wrote a pretty good series about self-hosting emails back in (gasp!) 2014: https://arstechnica.com/information-technology/2014/02/how-to-run-your-own-e-mail-server-with-your-own-domain-part-1/ https://arstechnica.com/information-technology/2014/02/how-t...