I have been a long time user of Thunderbird. It does its job even though its a bit wonky at times. It's become stale to me so I searched high and low for a replacement and found eM Client. So far I am really impressed with it. It seems to be more thought out and fluid. Maybe because its new I am enjoying it? Whatever the case may be if you are bored with your client and wanna get dirty with another program check it out. If you have eM Client let me know what you think of it.