Mimecast

Mimecast Ltd. head-quartered in London is a tireless innovator and service provider in e-mail, messaging and utility IT, which provides high-quality, internet-delivered systems that radically reduce the cost and complexity of email management and IT infrastructure for business' of all sizes. Mimecast is also a strategic supplier of web-managed IT infrastructure for the growing number of managed service IT companies.

Managed via a single web interface, Mimecast helps companies avoid the cost, risk and complexity of an accumulation of IT point solutions and provides system administrators with flexibility, rapid implementation times, best-practice features & functionality and unprecedented ease of use. Mimecast's scalable software solutions are instantly configurable and can enhance or replace existing technology, improving effectiveness and radically reducing total cost of ownership and operation for any business where communication, or communication management, is mission-critical.

http://www.mimecast.com/What-we-offer/Email-Security/secure-email-gateway/