[SpamCop-List] plz discredit this idea
jay at advertisnet.com
Thu Aug 12 11:02:29 EDT 2004
This has got to be an obvious idea that can be easily discredited,
whoever does, please dont just say that it wouldnt work 100% of the time
and thus is no good, if it took out a significant percentage of spam,
it be worth doing?
What if the community of legit internet mailers and ISPs, agreed to adopt a
convention where the reverse dns of every ip would contain a code to
whether that ip should be capable of port 25 mail traffic?
If all the DSL providers would put the keyword DSL in the 3rd level (or
in the reverse dns entrys of all their DSL ports, and
if cable would put 'cable' or 'CBL' likewise, and
if all ISPs and network admins put 'MAIL' in their reverse entrys for
legitimate mail servers, and 'DIALUP' for their dialup ips,
DSL-port1.sprint.com (I think sprint already does put dsl in reverse)
Couldnt this stop a large enough percentage of spam to make it worth doing?
Do all spam programs rely on spoofing? Would such a plan eliminate all
non spoofing spam program email?
Obviously there would be a problem with getting everyone to sign on with
such a plan,
perhaps there could be a new, private email network built where the email
only talk to other servers within the group. Does anyone know where this is
already being done?
Also, why dont more ISPs block outbound port 25 for their endusers, and make
use the ISPs outbound mail server? We do. I dont get any complaints about
out of our network anymore. Viruses are a different story of course..
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