The best thing about this software is that it has all in one solution for email security including spam filtering which makes life easier when you have multiple domains with different requirements like blacklists etc.. It also provides great reporting options so we can easily monitor our domain's performance as well its growth over time along side other reports provided by spamproject itself such us number/percentage report or even customised ones if required! I wish there was more customization available but overall i am very happy using their products!! We are solving various issues related to mail server configuration management (such smtp servers) & data analysis through outbound ecommerce website traffic from clients who buy product online via my websites - hence providing them good customer experience at same instance too!!