Review on eM Client by Jeb Moorehead

I like that it's very customizable so you can change how things look easily! It has some great features but sometimes crashes when switching between multiple windows (I have 4+ open).

If this happens to be your experience as well then maybe try another program? There are many other options out there if they don't suit what you're looking for in an application. This helped me organize my emails better than anything else - even Outlook or Gmail themselves do not compare at all to its level of organization/customization available through their apps!!