Email Encryption Gateway

What Does Email Encryption Gateway Mean?

An email encryption gateway is an email server which is used to encrypt outgoing mail and decrypt incoming mail. This is an appliance-based security solution that is placed between the enterprise network and the outside network such as the Internet.


Aside from encryption and decryption of email, these gateways often also serve as spam blockers and scan for viruses.

Techopedia Explains Email Encryption Gateway

An email encryption gateway secures all email leaving the enterprise network according to configurable encryption rules which eliminate the need for client software and further user intervention.

So from the user’s end, they are simply sending email normally; this email is then captured by the gateway, encrypted and then sent on its way. Incoming emails that are encrypted get decrypted so that they can be read and also scanned for viruses.

In recent years, the email encryption gateway has also become virtualized, meaning that there are now virtual solutions which do not require actual gateway hardware. Instead, the gateway is a virtual machine which exists in the enterprise network somewhere and all emails simply need to be routed through it for it to do its job.


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Margaret Rouse

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.