John F. Woods writes:
> Can sendmail 8.9.0 reject mail due to non-envelope headers before receiving
> the entire message?  

Well, not really.  The headers all come over as part of the SMTP DATA
command along with the message body.  You have to physically transfer
the message.

On the other hand you don't have to accept the message at the SMTP
level.  You can blow it off with a "550 stick this spam in your ear
buddy", and the host that is sending you the spam gets to generate a
bounce msg.  This is a very nice feature, since nothing gets the
undivided attention of the admin of a spam-relay more quickly than
having a bunch of bouncing spam messages from an off-site sender to
other off-site recipients.

> It's not too hard to set up procmail filtering to nail these (I nail
> these and a few others), but that's after inhaling the whole
> message.  (It also requires a fork and exec, but procmail will also
> do local delivery, so it's no worse for real mail.)

The main advantage over procmail filtering it is in the sendmail
filtered case you get to decline the responsibility for the msg, and
the other guy gets to send the bounce.  Its kind of heart-warming
really. ;-)

-wolfgang
-- 
Wolfgang Rupprecht    <wolfgang@wsrcc.com>     http://www.wsrcc.com/wolfgang/
	  Never trust a program you don't have sources for.