I host my own using a VPS with OpenBSD, OpenSMTPD, and Dovecot. I like having unlimited mailboxes and aliases. In-bound is easy with DNS checks filtering all s

I host my own using a VPS with OpenBSD, OpenSMTPD, and Dovecot. I like having unlimited mailboxes and aliases. In-bound is easy with DNS checks filtering all spam. Out-bound is somewhat out of my control, so I use a relay like smtp2go or sendgrid for reliable delivery.