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Unwanted content in email messages includes malware, phishing attacks and spam.
Some email security gateways can also detect and block the transmission of sensitive data, such as credit card numbers, social security numbers and healthcare records.
Optional add-ons are available for Symantec Messaging Gateway -- Content Encryption or Gateway Email Encryption -- and Trend Micro Inter Scan Messaging Security -- Data Privacy and Encryption Module.
Buyers should thoroughly evaluate every DLP feature or email encryption feature on its own merits before product selection.
Email security gateways also offer similar monitoring capabilities for outbound email.Some of the significant players in the email security market include the following: Companies have evaluated these products based on publicly available information against five criteria: the sophistication of the basic security functions, additional security functions, management usability and customizability, typical false positive and false negative rates, and reliance on external systems for email processing and storage. They are meant to be used as part of an organization's larger product evaluation process.Each organization has unique requirements, needs and environments, so, similarly, admins must tailor the product evaluation process for determining the best email security gateway to their own enterprises.When performing a product evaluation, an organization should identify any such techniques that products offer and ask for more information about the details behind them.
As mentioned in the first criterion, the best email security gateway products offer antivirus, antimalware, antiphishing and antispam features.Another advanced detection technique involves the use of threat intelligence.