Finallly, I found a solution for that.
If your email supports pop3 and smpt protocols, this solution works for you.
It means if you can send and receive your emails by "outlook" in your computer you can do the same in your BB with this application, and it does not need obligatory data plan. It works with WIFI "Without data plan" too.
It doesn't need the third party server and send (and receives) your email directly.
The solution is "logicmail" application for BlackbBerry.
Go to "logicmail.org/ota/" by your BB browser and choose your suitable OS and install it.
You should enter the correct setting for "pop3" and "smtp".