Get comprehensive email gateway security along with advanced capabilities that help you ensure business continuity-whether you host your email on-premises or in the cloud. Barracuda Email Security Gateway gives you industry-leading protection against spam, viruses, and advanced malware-including zero-day ransomware and other threats when Advanced Threat Protection is enabled. Outbound filtering prevents data loss, and 96-hour email spooling in the Barracuda Cloud ensures continuity in case of email server downtime. Email Security Gateway is available as a physical or virtual appliance, and in cloud-native versions on Amazon Web Services and Microsoft Azure.