[cobalt-users] Email Trap ( Tripwire?) block spammers

[Bill Gunning <bgunning@xxxxxxxxxxxxxxx>]

I would like to setup 4 or 5 email addresses for spamers to find
like bob@xxxxxxxxxx & tom@xxxxxxxxxx then if someone uses these
addresses my RaQ would add them to a block list with the time &
email used... And would not receive any email at all from 
the sending email server...

Has anyone tried something like this? And what would be involved?
Procmail? Tripwire? 

Bill