Proxmox Mail Gateway
https://pmg.proxmox.comProxmox Mail Gateway is an open-source email security platform based on Debian GNU/Linux. It protects your mail server from spam, viruses, trojans and phishing emails. The full featured mail proxy is deployed between the firewall and the internal mail server and allows to control all incoming and outgoing email traffic from a single platform with a central web-based …
Proxmox Mail Gateway - Email Security Solution
https://www.proxmox.com/en/proxmox-mail-gatewayProxmox Mail Gateway is the leading open-source email security solution helping you to protect your mail server against all email threats from the moment they emerge. The flexible architecture combined with the userfriendly, web-based management interface, allows IT professionals and businesses to control all incoming and outgoing emails with ease, and to protect their users …