On Aug 13, 2006, at 8:41 AM, John D. Hardin wrote:
There still remains the question about what **exactly** should the
numerator and the denominator be when calculating that percentage?
Any ideas yet?
Not from me.
I don't know either. I base the general idea on the IronPort "Sender
Base Reputation Score", but that's not an open content thing. You can
browse their database, but it wont tell you the actual -10
(overwhelmingly likely to be a spam sender) to +10 (pure innocent
angels of email) rating unless you've got a license. You can set the
IronPort box to whatever threshold you want for blocking sending hosts.
I like the idea of an RBL gives ratings instead of binary values.
That's why I thought of it being a "confidence percentage" instead of
just a "yes, we have them listed in the zone". How to build that
confidence rating is another matter entirely.
SBRS is a cross section of data sources and data items, whereas what
we're talking about here is a single data item (whether or not we can
trust a host based upon who its domain registrar is). So it's not like
we can start out by pulling data from multiple zones and building up a
number based on how much we trust each zone and how many zones someone
is listed in. The only other thought I have, which is not going to be
an immediate result, is simply to have people give feedback, over time,
about different hosts ... and then have that feed into a database which
tracks hosts and registrars to build up that confidence rating over
time.
Sorry, my idea is only half baked so far :-}
