Re: PAB pab-submit@gtld-mou.org

Dan Busarow (dan@dpcsys.com)
Mon, 12 Jan 1998 09:56:25 -0800 (PST)


On Mon, 12 Jan 1998, Robert Shaw wrote:
> We have several complaints about spam hitting the
> pab-submit@gtld-mou.org mailing list. One alternative
> is to shut down this address. What do you think?

Don't shut down a list just because some spammers hit it.

>From my experience with stemming the tide here,
a couple of simple steps can reduce spam greatly.

First, only accept mail from senders with working DNS.
We started this a couple of months ago and haven't
received any complaints. I catch 700-1500 spams per
day with this. I review the logs periodically and that
really is spam, not DNS failures.

Check for valid Message-IDs. That seems to catch about
half of the remainder which is all from hijacked relay
sites.

You can do more but this stops a huge percentage of spam
and no one has an excuse for broken DNS on an SMTP host
or for invalid message ids.

Dan

-- 
 Dan Busarow                                                  714 443 4172
 DPC Systems / Beach.Net                                    dan@dpcsys.com
 Dana Point, California  83 09 EF 59 E0 11 89 B4   8D 09 DB FD E1 DD 0C 82