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To: Doug Kwan ~{9XUq5B~} <ctkwan@cs.hku.hk>
Subject: Re: mail bomb! 
Cc: Petri Helenius <pete@sms.fi>, security@freebsd.org
In-reply-to: Your message of "Mon, 16 Dec 1996 16:45:03 +0800."
		<Pine.SUN.3.91.961216164217.1685A-100000@champion> 
References: <Pine.SUN.3.91.961216164217.1685A-100000@champion>  
Date: Mon, 16 Dec 1996 15:07:09 -0700
From: Warner Losh <imp@village.org>
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In message <Pine.SUN.3.91.961216164217.1685A-100000@champion> Doug Kwan ~{9XUq5B~} writes:
: Most ISP's have customers who are not computer gurus. Asking them
: to use PGP to verify all our messages would not be a good idea. Anyway
: we would take your advice to digitally sign all our messages. 

However, if you do sign all the messages, then you could filter all
those not signed by the right key.  The users needn't know which ones
are good or bad, or how to use pgp even.  It would be a big clue to
sendmail to filter out messages based on content (if it can do that).

Warner