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Date:      Sun, 07 Sep 1997 16:55:44 -0400
From:      Drew Derbyshire <ahd@kew.com>
To:        "Jonathan M. Bresler" <jmb@FreeBSD.ORG>
Cc:        hackers@hub.freebsd.org, support@kew.com
Subject:   Re: spam and the FreeBSD mailing lists
Message-ID:  <341314D0.E22ADFF3@kew.com>
References:  <199709070254.TAA21387@hub.freebsd.org>

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Jonathan M. Bresler wrote:
> therefore, we are not blocking mail from sites that can not be
> resolved in the DNS.  not that i dont want to, there are just too
> many newbies out there that send mail to the lists.

You really do want to enable that.  

First off, it really does kill much spam.  

Just as important, however, is that bounce messages just plain _don't_
_work_ for such users when they are legitimate, and a specific useful
message reporting that the host cannot be resolved is going to do more
to solve their (or their ISP's) long term problem with lost bounces more
than blindly accepting mail which doesn't have a valid address.

The TCP/IP protocol implicitly requires public IP address to be properly
registered to be routed (otherwise, you don't get your ACK's back!),
there is no sin in requiring public e-mail addresses registered as well.

Note too, that newbies tend to not start with e-mail from their own
sites, they use their existing connection (Windows connected to an ISP
POP3 server or whatever) to get up and then migrate.  I've handled
e-mail support for UUPC/extended for ~ 8 years, I've watched the pattern
for that long -- my help desk is now reading this over my shoulder, and
her comment is "Yup -- and that any list which is spammed is less
helpful".

-- 
Internet:       ahd@kew.com             Voice:          617-279-9810

"MS-DOS didn't get as bad as it is overnight -- it took over ten years
 of careful development."               - dmeggins@aix1.uottawa.ca



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