[cobalt-users] [RaQ3] spamassassin and sending back an error 5xx ?

[Kim Schulz <kim@xxxxxxxxx>]

hi
is it possible to get procmail to send back an "unknown user" error if
spamassassin has tagged a mail? The reason that I want it to do so is
because I this way can get alot of our users mail adresses out of the
bulk mail lists (alot of them are removing false adresses, and if we
react af a false address to spammails then we will get off the list). 

Any ideas? is it possible

-- 
Kim Schulz - Freelance Development | You will pay for your sins.  If
Email      : kim @ schulz.dk       | you have already paid, please
Tlf        : 51904262              | disregard this message. 
?