Question : Sending Mail External - Domain Challanges

I am working with a client that has a domain name (for the sake of the questions) is NOTTHATCREATIVE.ORG as their internal domain, and BORINGDOMAIN.ORG as their external domain. Why it's this way I dont know. So now someone in the agency needs to send to a party that uses NOTTHATCREATIVE.ORG as their external domain.

Is there a way I can tell exchange to send via IP address, or maybe use a contact card to make it work?

Thanks!!!

Answer : Sending Mail External - Domain Challanges

Take a look at this link as it gives a few ways to disable content filtering...
http://technet.microsoft.com/en-us/library/aa995953.aspx