This is my perspective alone and isn't meant to sway anyone's opinion, this is just my experience as it's been. Having owned and run my own mail servers mysel

This is my perspective alone and isn't meant to sway anyone's opinion, this is just my experience as it's been. Having owned and run my own mail servers myself for some 10 years, I'll tell you something for nothing. Owning your own mail server is not something that comes for free. At least, it wasn't for me. Unless your product has brought something that's drastically different in terms of software, security and spam maintenance, it's too much of a pain in the ass for a non-technical person to manage. Heck, I'm about as technical as they come. I ran plenty of different kinds of mail servers in those ten years. The effort and inconvenience it caused in that time just wasn't worth it to me any more. Having to stress out every time I moved, needing to make sure my internet wasn't shut off until I left the premises and making sure it was already on at the new premises before I could move anything, always being the guy on call if my mail server went down. Then came Cloud and I no longer had to worry about physical hardware ownership and maintenance. I no longer had to worry about if my internet at home was working. The opportunity to move my mail server to a VM, and then hosted Exchange and now Office 365. This has offered me so much mental freedom, I don't think I could go back. The added stress wasn't worth the extra flexibility and security in my mind. All my email is now handled by Microsoft. Sure it costs me a little money each month, but I've got the peace of mind that their security team is on it and while I'm pretty security savvy, I've got nothing on their security team. In addition, I'm not the guy on call when everything falls to pieces. I realize that most technical people won't have my perspective on this, but it's definitely something you should think about.