Basically, this mail program is the same as Thunderbird, except that the authors expect you to pay $35 for the home edition—the "pro" version costs more. Like Thunderbird, it supports encryption, has a filing and label system, and filters spam. About the only difference I see between the two programs is that The Bat can somewhat detect group mails and lists, and it has an advanced rules system. However, the vast majority of us really don't need such a complicated rules system, leaving me to wonder what idiot would pay almost forty dollars for something that can be had for free? If they gave it away, I would have given it four stars, since it would be an interesting alternative to the ubiquitous Thunderbird program. But since Thunderbird does essentially the same thing, and doesn't cost a dime, I'm giving the program a very low rating.