[Spambayes] Identified Spam

[David Lewis]

Sorry if I am a bit stupid, but what actions actually happen when a Spam
has been identified ?
 
Does the sender / administrator of the Spam get a message telling them
to stop, or telling them that the address was not valid etc ?
 
I cannot find this on the information pages.
 
Whilst I am getting Spam identified, into junk or suspect, the actual
volume is not getting any less - in fact it is possibly increasing !
 
Any help / advice would be welcome.
 
Thanks in advance.
 
DAVID