[Spambayes] Bouncing Spam

[Bill Yerazunis]

   From: Tim Stone - Four Stones Expressions <tim@fourstonesExpressions.com>

   This is a bit off topic, but perhaps someone knows... Is it
   possible to return a mail in such a manner that it appears to the
   sender to have bounced?  It'd be real nice to have a 'bounce'
   option for spam, so that the senders *might* take the address off
   their list, if they think it's a dead address...

Yes, BUT you have to be the program sitting on TCP port 25, which
means a privved program, or at least a trusted one.

You certainly can fake a failed address by returning a code 550 in 
response to a "rcpt to" command from the other end.

Read the RFC (I think it's RFC-2822 but not sure) for the
permissible error bounces, and when you can send them.  All 5xx codes
are errors of one form or another, and I believe that code 550 is
"user unknown".  However, some implementations may get very
annoyed when you pop a 550 response any time other than after "rcpt".

There _are_ other 5xx codes you can use that generate bounces,
but heck, give it a try.  The worst thing is... the mail may 
bounce!  :)

Maybe I should... code this up?  :)

	  -Bill Yerazunis