Proxmox Mail Gateway - Protect mail server against spam, viruses and malware with Proxmox Mail Gateway security for businesses, government, education and non-profit organizations.
TinyWall - Lightweight and non-intrusive firewall
SpamAssassin - Use this program to "Unspam" your mailbox(es).
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.
Rspamd - Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules...
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...