Free & Open-Source Mimecast Email Security Alternatives

Cloud email security gateway.

1. Rspamd ↗
   ●●○Medium · Different UI, similar features
2. SpamAssassin ↗
   ●●○Medium · Different UI, similar features
3. Mailcow ↗ FOSSPRIVATESELF-HOST
   Dockerized full self-hosted mail server.
   ●●○Medium · Different UI, similar features