abuse of all_spam_to

[Patrick Wolfe]

I noticed today that an image spam email passed through my 
sendmail/mimedefang/spamassassin config, because it was addressed to 
multiple destinations, one of which was an address configured as 
"all_spam_to" address.

It would be nice if only the mailbox that wants the spam got the spam, 
instead of the existance of an any "all_spam_to" address causing the 
message to be delivered to ALL of the listed destinations.