I like how easy it was for me as an admin user of my organization's domain controller (DC) server/mail box setup when setting up this product; also love its ease-of integration into Exchange Server 2010 SP2 / 2003 environment since we have Microsoft products running there! Only thing about topsece mail securty i dislike so far is not being able to see who opened which eMl within our system - would be great if one can view such info using logon events data viewer option available under advanced settings section while configuring Mail Secuirty feature through Central Admin console UI interface only? Yes you read correct!! If any other features are more beneficial than viewing openers' details please let us know by posting feedbacks here via comments page provided below post itself :) You will find everything related information regarding configuration aspects etc right inside central administration web portal where all options pertaining above mentioned functionality reside once they get activated during setuppage process!! I like how easy it was for me to setup my account as well as set up alerts/notifications so I can be aware of any issues. It has been very helpful thus far! Nothing really. Just make sure you are fully informed about their services beforehand. Make sure they have all your requirements covered. If not we did receive false notifications which were not useful. We used topsec to protect our corporate emails against viruses, phishing attacks etc.