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FortiMail
Area 1 Security
Security Gateway
Barracuda Email Protection
simplewall
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GlassWire
Windows 10 Firewall Control
Little Snitch
HostsMan
NetLimiter
BeeThink IP Blocker
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Simplewall
Prompt on screen
Older UI as compare to tinywall
I haven't found an option for block by PID if in case it bother you
Packet logging is there, helpful for insight
Update: DNS query resolve available (* only on pop up window, not available in packet log history)
Last update 05 / 09 / 2020 (https://github.com/henrypp/simplewall/blob/master/CHANGELOG.md)
Proofpoint Email Security and Protection - Learn about Proofpoint's email security solutions that protect organizations against threats such as email fraud, phishing, spam, bulk email, and viruses.
TinyWall - Lightweight and non-intrusive firewall
Symantec Email Security.cloud - Symantec Email Security.cloud provides always-on, inbound and outbound email security against malware, targeted attacks, and advanced threats
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
Cisco Email Security - Cisco Email Security protects against ransomware, business email compromise, spoofing, and phishing.
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.