theres plenty of how-to step by step knowledge bases out there, google 'how to set up postfix with dovecot'.. i think i used the gentoo wiki and copypasta'd muc

theres plenty of how-to step by step knowledge bases out there, google 'how to set up postfix with dovecot'.. i think i used the gentoo wiki and copypasta'd much of it.. it takes a bit of time to set up a decent mx server, in addition to configuration, you gotta set up a db, generate/sign crypto certs, maybe do a little web-dev to make shit easy to admin.. with regards to this you rly dont want anything on a publically facing ip.. but once again tons of how-to for config out there