Proxmox Mail Gateway is an OpenSource email security platform based on the Postfix solution.
This solution includes, among other things:
- a management and monitoring interface
 - integration of antivirus and antispam
 - quarantine management per user
 - mechanisms for controlling incoming emails: SPF, Greylisting …
 - the signature DKIM outgoing emails
 - server clustering for high availability
 
Integration Scheme



