Andy Bradford wrote:
Thus said Gabriel Gunderson on Fri, 30 Sep 2005 17:11:18 MDT:
Do you all find that you need to set up your mail servers using these
two (domainkeys and spf) methods for verifying non-spam?
No. Neither of them will really block that much spam. SPF may currently
help you block more spam than DomainKeys though.
They're not meant to block spam. They're meant to authenticate where
the email came from.
Basically, DK and SPF make whitelisting domains feasible. If you know
that AOL actively keeps their users from spamming, and AOL publishes
SPF/DK records, then you can whitelist all email from AOL. Assuming it
passes the SPF/DK test, that is.
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