[lug] Rejecting email

[Peter Hutnick]

On Saturday 09 March 2002 08:13 pm, David Morris wrote:
> Anyone know how (if?) email can be rejected in a .procmailrc file such that
> the originating host gets a response back that says the user does not
> exist?

You can't /exactly/ do this, since to do that properly the MTA would have to 
give an error when the sending system says "rcpt to:".  That's the only 
chance you have for getting off of spam lists by rejection, since SPAMmers 
use bogus Errors-To headers.

All that said, there is a recipe for sending rejection notices at 
http://www-acs.ucsd.edu/mail/procmail.html#label5 (BTW, it took me like 15 
seconds to find that on google).

-Peter