On Sat, 19 Mar 2011 05:42:22 +0400
Hamad Ali <crownco...@hotmail.com> wrote:

> Can I assume that your solution that detected a portion of the spear
> phish is 100% SA? In case not fully SA, any hints on its mechanics?

It's not fully SA.  We don't use the SA Bayes implementation; we have
our own that considers both individual words and word pairs.  We also
have a shared Bayes database among our customer sites.  We keep a
window of mail over a few weeks and do nightly Bayes database updates;
our database currently contains tokens from about 1.7 million messages
(~800k spam and ~900k ham).

We also use the APER list at http://code.google.com/p/anti-phishing-email-reply/
that I mentioned before.  And finally, we run our own DNSBL lists (described
at http://www.roaringpenguin.com/products/canit-reputation-rbl)

> Any approximate numbers on percentages of detected spear phish vs.
> slipped through ones?

I have no idea.  Our customers don't always report statistics back to us.

Regards,

David.

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