Fetch Mail in Admin Control Panel not working

Hi,I had integrated JForum to my Project ,and FetchMail in AdminControl is not responding,i dont know the purpose of this fetch mail also,can any body clarify me ,the purpose ,and its not working in my project also..

I have not looked into this in any depth as we do not use this feature on this site. However my cursory looking at the code indicates that it should be possible for your JForum users to receive emails whenever there is a post, and they should be able to respond via email, and the Fetch Email functionality should get that response and put the relevant data into the topic as though the user had responded directly in the topic.