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A comment on IPv6 Will Worsen the Spam and Malware Problems. Parent comment

Re:IPv6 Will Worsen the Spam and Malware Problems by tomjen3 on Monday December 20, 2010 @01:17PM (#2025182)
There are better methods than just doing a dns check. Actually signing the messages works too, as does whitelisting of ips by the domain owner.
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Re:IPv6 Will Worsen the Spam and Malware Problems by mike-cardwell on Monday December 20, 2010 @02:54PM (#2025522)
You're describing SPF and DKIM. Both of which can be used by people sending legitimate mail, and people sending spam...

SPF and DKIM are good for preventing some false positives. They're not good for stopping spam.

I would bet that currently, well over 90% of spam that is rejected, is rejected because of blacklist lookups.

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