While the specific steps can vary depending on the software you choose, here is a general guide:
Choose your operating system (Linux, Windows, etc.). Install the chosen email server software using package managers like apt-get for Debian-based systems or yum for RedHat-based systems. Configure the software with appropriate settings (domains, users, etc.). Set up firewall rules to allow email traffic. Configure DNS records for MX, SPF, DKIM, and DMARC. Test the setup by sending and receiving emails.