Mimecast Gateway - Mimecast Gateway is a SaaS-based email security solution that uses sophisticated, multi-layered detection engines and intelligence to protect email data and employees from malware, spam, advanced threats and zero-day attacks.
SpamTitan - Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.
dmarcian - Safeguard your email from abuse
Sanebox - SaneBox is a cloud-based service that allows users to filter and manage their emails.
Hornetsecurity - Hornetsecurity offers you comprehensive, integrated managed e-mail security services.
ZeroSpam - Cloud email security & anti-spam solution