A complete email solution for sending and receiving email. With support for IMAP4, SMTP, SPF, DKIM, DMARC, MTA-STS, DANE and DNSSEC, reputation-based and content-based junk filtering, Internationalization (IDNA), automatic TLS with ACME and Let's Encrypt, account autoconfiguration, webmail.
Use the quickstart command to set up mox for your domain(s) within 10 minutes. You'll get a secure mail server with a modern protocol stack. Upgrades are mostly a matter of downloading the new version and restarting. Maintenance via web interface (easy) or config file (powerful). No dependencies.
Github: https://github.com/mjl-/mox