SpamExperts - SpamExperts applies its proprietary smart technologies to eliminate spam, virus and malware mail before it reaches your network.
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.
Datatune Spam Filtering - Datatune's hosted antispam solution is a cloud-based email security tool.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Kundenserver - Kundenserver is an RBL-style host verification service to secure servers from spam emails.
Better Uptime - We call you when your website goes down