Mimecast Limited is an American–British, Jersey-domiciled company specializing in cloud-based email management for Google Workspace, Microsoft Exchange and Microsoft Office 365, including security, archiving, and continuity services to protect business mail.

History

Mimecast was founded in 2003 by Peter Bauer and Neil Murray. It has offices in London, Boston, Chicago, San Francisco, Dallas, Cape Town, Johannesburg, Melbourne, Sydney, Amsterdam, Hilversum, Singapore, Dubai, Bengaluru, Munich, Paris and Israel. On October 16, 2015, Mimecast announced that it filed its registration statement for a proposed initial public offering (IPO). Mimecast began trading on the Nasdaq Global Select Market under the ticker symbol "MIME" on November 19, 2015. The offering closed on November 24, 2015.

Acquisitions

On July 10, 2018, Mimecast acquired cybersecurity training start up Ataata. On July 31, 2018, Mimecast acquired Solebit. On November 14, 2019, Mimecast acquired DMARC Analyzer. On January 6, 2020, Mimecast acquired Segasec. On May 19, 2022, Mimecast was acquired by and become a wholly-owned subsidiary of Magnesium Bidco Limited, an affiliate of Permira Holdings Ltd. On July 24, 2024, Mimecast acquired Code42.

Founding

Mimecast co-founder and former CEO, Peter Bauer, previously founded FAB Technology in the mid-nineties and sold it to Idion. Earlier, Peter trained as a Microsoft systems engineer and worked with corporate messaging systems. Mimecast co-founder and former CTO is Neil Murray, previously CTO at Global Technology Services and founder of Pro-Solutions. Another significant former executive is Mimecast Chief Scientist Nathaniel Borenstein, who was amongst the original designers of the MIME protocol for formatting multimedia Internet electronic mail - he sent the world's first e-mail attachment on 11 March 1992.

Technology

The service uses a massively-parallel grid infrastructure for email storage and processing through geographically dispersed data centers. Its Mail Transfer Agent provides intelligent email routing based on server or user mailbox location. Email Security Information Archiving Mailbox Continuity DMARC Awareness Training Brand Exploit Protect

Security and privacy breaches

In January 2021, a Mimecast security certificate was revealed to have been compromised, potentially allowing attackers to intercept communications with Microsoft-based email servers.