Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.

Barracuda Email Security Gateway - Barracuda's Email Security Gateway is a powerful antivirus filter specifically designed to identify and eliminate email-borne threats, stopping hazards before they reach the network.

logstash - logstash is a tool for managing events and logs.

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.

Wazuh - Open Source Host and Endpoint Security

Cisco Email Security - Cisco Email Security protects against ransomware, business email compromise, spoofing, and phishing.