Postfix Relayhost exemptions

I have a Postfix server which receives mail messages and if they are not local forwards them to another host... using the relayhost = [x.x.x.x] directive in main.cf After configuring the relayhost, some domains are marking as spam the messages by the remote servers, i think is for the hop between

Re: Postfix Relayhost exemptions

Noel & Rob0: Thanks for your help...