Tumbleweed MailGate is a suite of products for protecting, filtering, monitoring, and securing email communications. These products, which can be used individually or in combination, enable organizations to block threats at multiple points in their email networks and dynamically encrypt and route email messages based on administrator-defined policies and industry regulations. Tumbleweed's comprehensive email security offering, with functionality ranging from inbound threat prevention to outbound content filtering, monitoring and encryption. A powerful and cost-effective turnkey anti-spam/anti-virus solution, available as a hardened Linux appliance. A secure email relay appliance that delivers state-of-the-art network-based email defense against dark traffic like DHA and DoS attacks. A policy-based, secure message delivery solution that inspects incoming and outgoing mail and dynamically applies user-defined encryption and routing preferences.