Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
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.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Symantec Email Security.cloud - Symantec Email Security.cloud provides always-on, inbound and outbound email security against malware, targeted attacks, and advanced threats
Better Uptime - We call you when your website goes down
Cisco Email Security - Cisco Email Security protects against ransomware, business email compromise, spoofing, and phishing.