i had install qmail in my redhat 6.2 to replace sendmail, to make it a mail server, actually i'm had no experience in setting up and email server. so i had all of u can teach me how to do it.

The problem i having now is that i already install qmail, following the instruction in "Life with qmail". i'm able to send out the email to recipient, but i can't send back to myself from another terminal.

For example i'm using kk@xxx.com to send to a recipient (a@aa.com). As a recipient (aa) i able to get the email but once i reply back to (kk), i dunno where to get the email that sent by aa.

I REALLY NEED YOU ALL EXPERT HELP ME, AS I'M JUST KNOW QUITE BASIC IN LINUX, SO PLS TEACH ME IN DETAILS.
I'M REALLY GRATEFUL TO U ALL, THANKS. HOPE CAN HAVE RESPONSE AS SOON AS POSSIBLE. :)