Updated 01/02/2007

Author:		Andrew Schwabe <aschwabe@gmail.com>

This is a qmail patch and associated utility script for validating local email addresses
and denying bad rcpt's at the smtp request.  This overrides qmail's default behavior of 
accepting emails and generating a bounce message later, thus reducing the amount 
of spam that comes through your mail server that can bog things down.

NOTE:  These files come with NO WARRANTY, period.

The qmail patch was not originally written by me, however it was modified by myself to work
with a standard qmailrocks installation.

The vchkrcpt.sh script was designed for use with qmail+vpopmail, so this may not be appropriate 
for other configurations.  This utility checks multiple ways to see if an email address is valid
(including aliases, default catchall assignments and overridden addresses).  It also logs
useful data about sender and recipient in your maillog to make it much easier to track individual
messages that go through your system.  It also looks in your log file to see if the sender has sent 
too many messages with bad recipients, in which case it can throttle the user as a spammer.

You may use this software freely.  If you like it or distribute it, all i ask is that you give 
credit for my contribution.

cheers