virtual domain hosting

[Vishwanath Paranjape]

hi all
i am trying to setup virtual domains using qmail
i installed qmail on redhat 6.0 and its working ok
but i tried to setup virtual domains 
i read the complete documentation along with the distribution
my virtualdomains files is as follows

domain1.com:jim

but the mail addressed to
[EMAIL PROTECTED]
bounces back
saying "no such mailbox"

but the mail addressed to 
[EMAIL PROTECTED]
gets delivered to [EMAIL PROTECTED]


please help
vish