Review on Libraesva Email Security by Omar Austin

You can use it with your office apps like MS Office 365 so you don't have worry of losing emails in case something happens! It is very expensive but worth for sure if want secure access over corporate network where everyone has different devices (laptop/PCs etc).

If they implement some new feature which require additional fee then again this should be disclosed before purchasing otherwise its hard decision whether purchase one time license OR pay per usage basis - that will depend upon how much data do we need at our end point? I used my work laptops when travelling outside India using Outlook webmail interface only because i was not allowed by IT department to install client software locally due no connectivity there while traveling out side country!!