Re: Shocker: DKIM antispam standard can't stop spam

[Valdis.Kletnieks () vt edu]

On Fri, 13 Jul 2007 16:37:02 EDT, Dude VanWinkle said:
> So if you have 1,000,000 spam a day at 50KB  per spam and you have to
> pay for the bandwidth, backing them up to tape and disk, added to the
> expansion of email storage (one of the most expensive types IMO) It
> still isnt worth it to list every server who can send out mail from
> your domain? Maybe the returns dont match the investment, I dont have
> the numbers to run the math..

It *would* be, if a fraction of the spam we got had vt.edu source addresses.
But *we* don't filter out very much spam by listing what places can send with
vt.edu addresses.  *OTHER* places can filter any spam that shows up with
a 'From: vt.edu' on it.  But publishing vt.edu doesn't do *squat* for our
filtering spam that has some *OTHER* domain in the From: - we only get *that*
benefit if the purported source domain publishes *their* info.

To run it by once more - we publish, gmail gets the benefit. Gmail publishes,
*we* get the benefit. Nobody gets the benefit *themselves* by publishing.

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