It's extremely easy, simple user interface that is compatible across platforms like Android or iOS (mobile) app as well! And this really helps me send mass messages from my business email id which was one of our main challenges before using mail-WTF service!! Nothing at all so far nothing I can't say its good though it does not have many other options available for free users but if your organization has limited resources then go ahead otherwise they will charge some money after 1 month usage…