Re: RE: Forwarders

> Compare those US$10,000 with the cost for, say, a full page
> advertisement in Time magazine (which will probably have a smaller
> outreach than a large-scale email-spam has). The "buy 1000 domains to
> spam" advertisement will seem cheapo ;-)
But, those 1,000 domains may last for about 5,000,000 E-mails 
total.  $10,000 for 5 million E-mails is a *lot* more than what it costs 
spammers now.
And, since those domains *must* have DNS that the spammer controls, either 
they run their own DNS (requiring IPs, etc.) which is blockable, or use a 
DNS hosting company (which will quickly have to deal with the 
situation).  So it will become easier to catch these people.
What will happen in reality, though, is that spammers will most likely not 
register a single domain -- they will continue sending out their spam, 
knowing that SPF will reject it, but knowing that perhaps in a perfect 
world only about 1/2 of all recipients would be protected by SPF.  So until 
SPF reaches well over 90% of all Internet users, spammers probably aren't 
going to bother with their own SPF records.
                                        -Scott

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