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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