hi, 

i'm running qmail on my server behind a NAT'd firewall.  On my gateway, i 
run tinydns, dnscache, and dhcpd to create my local network. 

my problem is this:  when i try and send mail using qmail-smtp, i very often 
get the mail bounced back by the servers because mail.mylocaldomain "is not 
a valid domain"  how to i tell qmail-smtp to send mail as if it came from 
myhost.my.university.edu ??  (i can't put the host outside the firewall 
because of our network policies here on campus) 

thanks
 --joe