Currently I have several MX records pointing at my server for several domain names. When the mail comes in the Send Connectors send the emails to the appropriate server.
When I was running Exchange 2003 / GroupShield 6, I had no problems (SMTP Connectors).
Now that I've upgraded to 2003 x64/Exchange 2007/GroupShield 7 there is no more virus scanning at the Hub Transport/Send Connector level (works just fine if using the local Exchange mailboxes on that server)
I've checked the settings, but cannot find how to enable it.