I have a situation where an Application I have needs to relay mail through an Exchange Hub Transport. When it goes through the 2007 Hub Transport Relay, it strips off HTML formatting my client absolutely requires. When it goes through their old Exchange 2003 SMTP Relay, the mail is fine with no HTML stripping. But this server is being decommissioned in a week, so I need to get the 2007 Hub Transport to stop stripping the HTML. Anyone ever heard of something like this? if so, any heal is appreciated. The 2007 Server is Exchange 2007 Enterprise SP1 with SR9. The OS is Windows 2008, SP2 (NOT R2). Thanks all.

You didnt by any chance find an answer to this did you? I'm having an identical problem with Exchange 2010.