Mimecast Customer Satisfaction Rating
A COO at a medium enterprise financial services company would be very likely to recommend Mimecast for this reason:
I feel assured that we are protected from malicious emails whether sent externally or internally. The secure email makes it a safe way to communicate with our customers. We can detect and stop the intentional or accidental leakage of confidential information. I have the ability to find any email I have ever sent or ever received even once deleted from Outlook.