autowhitelisting

[oliver <ol...@netengine.at>]

Is there a posibility to do autowhitelisting based on recipient addresses of
outgoing mail? I.e. all outgoing mails from local users (or from the local
network) are scanned for recipient addresses and these addresses are then
put on the whitelist. since it's unlikely that spam comes from sender
addresses that users send email to, that would be a useful feature.
Is it possible to do this with spamassassin?
 
thnx
oliver