difference between hostname and domain name

[Rajagopal Subash]

Hi All: Our Domain name is called thakral.com.kh and the hostname is subash. I have few users created in my server to send and receive email winthin our office. systsem details is as follows.   Domain Name: thakral.com.kh Host Name: Subash   I have 2 accounts exists in my server they are subash1 and subash2. When I send a mail from Subash1 to subash2, the sender address is read as [EMAIL PROTECTED] , the same thing happens vise versa. But I would like the sender to be read as [EMAIL PROTECTED] and should be in a position to deliver to subash2 w/o any hassels. How to get rid of the host name in the email address.   Can someone let me know where is the mistake. Also let me know if any of the config files need to be corrected.   I am trying out this within our office, no dial up and internet connection available.   Subash