Using MailScanner to allow/block out of office replies

[Deja3]

Since Exchange can't allow/disallow out of office replies to the  
internet on a user-by-user basis (not due until Exchange 2007), can  
MailScanner be used to do this?

I have:

Internet - linux(mailscanner) - Exchange

Exchange relays through mailscanner.  Messages all contain "Out of  
Office AutoReply:" in the subject line.  I'd like to have a whitelist  
of internal exchange users  (user1 at somedomian.com,  
user2 at somedomain.com) in that file who would be allowed to relay  
through mailscanner, but then user3 at somedomain.com would not be  
allowed since they aren't in the whitelist file.  I still need for  
replies FROM the internet side that contain "Out of Office AutoReply:"  
to be allowed back to the Exchange box, of course.  So maybe the  
whitelist file would look like:

From:    user1 at somedomain.com   yes
From:    user2 at somedomain.com   yes
From:    *@somedomain.com       no
FromOrTo:  default              yes

And could something be put in MailScanner.conf to detect the Subject:  
Out of Office AutoReply: *" part that would use this whitelist if a  
match on subject was detected?



Any way to do that with the current version (4.54) of mailscanner?