Postfix relay issue
I have a postfix instance that relays mail for various servers in my environment. Normally each server relays to my postfix server via it's public domain name which works fine. I use the mynetworks file for to allow relay for thier various IP's / ranges.
The issue i have today is that there are a few servers that don't have public IP's and i am attempting to relay to my postfix instance via it's internal private IP. When i try to i receive the following error:
Relay access denied (in reply to RCPT TO command))
Is there anything in particular i need to add in my postfix config? I have allowed the private ip ranges to mynetworks.