I would certainly do disclaimers with Transport Rules, however, I have seen versions of ForeFront being used to add disclaimers.
Have you had any progress with this?
Cheers
Nathan
Nathan Winters - MVP Exchange Server
MCSE & MCSA 2000 & 2003 + Messaging, MCITP Exchange 2007, MCP, VMWare VCP v2 & v3.
Welcome to the Microsoft Messaging and Mobility User Group: http://www.mmmug.co.uk