The best part of this product is that it does not store any data or logs in our server, so we don't have to worry about storing sensitive information like credit card numbers etc.
This feature alone makes me feel safe with using their products as they are very secure. I am still waiting for some more features which can be integrated into this software but all in all its pretty good! We were looking for an email gateway solution which would help us keep track of emails sent from outside sources such as customers, vendors etc.