I quit using this at my last job because, although it supports opening mail in a new window, it did not support closing the message when you click reply/reply-a

I quit using this at my last job because, although it supports opening mail in a new window, it did not support closing the message when you click reply/reply-all/forward. It's not a big deal unless you have to clear upwards of 50 emails a day. Otherwise it was a great client, and it was much easier to customize than Outlook.