i installed my system with the following howto:
i have some exchange servers behind the Postfix mailgateway and i told the exchange to sender over the postfix.
incoming is working, example.com is routed from postfix to the exchange
if i want to send the mails out, i receive the following error from postfix:
450 4.1.8 (mail addrss): Sender addresse rejected: Domain not found
My Network in main.cf is 192.168.100.0/24 and exchange server has .20
on relay host i have .20 entered in the main.cf
what's the problen here?