What is a cloud filtering service (Proofpoint, Mimecast, Barracuda)?

Cloud filtering services provide enterprise-grade email security without requiring on-premises hardware. Organizations route their mail through these services, which filter threats before forwarding clean messages.

Proofpoint is known for advanced threat protection and targeted attack defense. Mimecast offers comprehensive email security with archiving and continuity features. Barracuda provides cost-effective protection popular with mid-market organizations.

These services combine multiple detection techniques: signature-based malware scanning, heuristic analysis, machine learning, URL rewriting and sandboxing, and threat intelligence from global networks. They also provide reporting and policy management consoles.

For senders, cloud filtering services add complexity to delivery. Your message passes through the cloud filter before reaching the recipient's mail server, and each layer may have different requirements.

Cloud filtering services are contracted harbor security firms. Organizations hire them to patrol their waters professionally.