Host your own SMTP server means setting up and managing an email-sending server that handles outgoing mail for your domain without relying on third-party email services. In practice, this involves deploying a mail transfer agent (MTA) like Postfix or Exim on a server, configuring DNS records (MX, SPF, DKIM, DMARC), securing the server with authentication and encryption, and maintainin... https://blog.oudel.com/how-to-host-your-own-smtp-server-step-by-step-guide/