MegaNameServers VS Hornetsecurity

SpamHero - SpamHero is a professional spam filtering accuracy while lowering the cost to domain and business owners.

Proofpoint - Proofpoint provides cloud-based email security, e-discovery and compliance solutions for companies to protect sensitive business data.

Kundenserver - Kundenserver is an RBL-style host verification service to secure servers from spam emails.

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.

SpamExperts - SpamExperts applies its proprietary smart technologies to eliminate spam, virus and malware mail before it reaches your network.

dmarcian - Safeguard your email from abuse