Watertown, MA, Nov. 23, 2016 -- Mimecast Limited ((NASDAQ:MIME)), a leading email and data security company, today announced it was purchasing substantially all of the assets of iSheriff, a leading cloud-based security provider. This acquisition will provide Mimecast customers additional real-time email threat intelligence and detection expertise and complements Mimecast's existing portfolio of email security, continuity and archiving solutions.