Proofpoint Messaging Security Gateway includes DLP and policy-based encryption, featuresdeployable on a single appliance. Proofpoint's e-mail security solution is available as anappliance, software, virtual appliance or hosted service. This report contains insight and analysis of the product or service strengths and weaknesses, list of buying criteria and how the product or service fares in each category, and a comprehensive table of product or service metrics and specifications. This report is useful for purchasers who need to evaluate products, or as a source of competitive intelligence for vendors.