Cannot receive mail
I am new at VPS + Vitualmin. Just created my site with Virtualmin but now i have a problem. The problem is that i can send mail but cannot receive mail, I checked my usermin but found no mail. And then i saw that on postfix configuration and i have to set up a map which looks like this http://i.imgur.com/NCx7lro.png Now can anyone tell me what i have to do there?