Mimecast is an email encryption and threat protection solution that offers a complete email management system for recording and monitoring all emails. It provides multi-layered detection engines and content protection to protect organizations' email communication from spam, viruses, and attachment threats. Mimecast's flagship is its sandboxing technology, which sets up a virtual environment to execute full security examination of the content before delivering the mail to the recipient. It inspects inbound, outbound, and internal emails, as well as graymail, mailing lists, and newsletters.