On Mon, Dec 15, 2003 at 06:31:31PM -0500, R. Scott Perry wrote:
| One thing that we are planning to do for our Declude JunkMail software is
| have an optional file that can be used to "force" SPF records. That way,
| our customers can add records for eBay and PayPal. They could use a lines
| such as "ebay.com v=spf1 +ptr -all", would force require E-mail from an
| @ebay.com sender to have "ebay.com" in the reverse DNS entry. It certainly
| isn't an ideal solution, but helps jump start SPF until the eBays of the
| world recognize it.
That's a good idea. (I expect the "force" records are only used when
the TXT lookup fails.)
Similarly, Mail::SPF::Query provides a best-guess result when there's no
SPF record.
The default $guess_mechs list, which users can override, is
+ a/24
+ mx/24
+ ptr
+ exists:%{p}.wl.trusted-forwarder.org
+ exists:%{ir}.wl.trusted-forwarder.org
The reputation system I occasionally think about building will bootstrap
using that approximation.
It's nice to have guess_mechs because local sites can define DNSBLs and
RHSBLs into their SPF plugins even if their MTAs don't support
DNSBL/RHSBL functionality.
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