postfix kinda not working
 

i have postfix 2.0.16 installed on redhat 9 i have it setup as a relay and it works if you send your message to user@ip.net but not if you send to user@domain.net i get the error message "User unknown in local recipient table" im not sure where to look for the problem and need some help

are you correctly registered with a DNS and do you have aliasing setup correctly to reflect your domain?

yes this is a config out of a working machine all that was change is the host name