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spamassassin-users: Massive drop in spam in network mass checks

Massive drop in spam in network mass checks in the last two weeks

From: <Darxus_at_nospam>
Date: Sat Oct 30 2010 - 17:12:54 GMT

In the last two network mass checks, today and a week ago, only 3.1% and
3.4%, respectively, of the corpora has been spam. Why?

Total number of spams in the network mass check corpora over the last five

20101002 585728
20101009 150082
20101016 154352
20101023 6858
20101030 6244

The percentage of the corpora which is spam dropped similarly over the same

The bottom two graphs on
are this data (total spam and ham, and percentage of corpora which
is ham). (I recommend firefox for this page. I opened a bug against
chrome for failure to scale embedded svgs properly.)

Such an extreme drop has happened three times before in as many years,
but this is the first time it was the result of a multi-week trend,
and the first time it stayed so low two weeks in a row.

The data is from

-- "When in doubt, gas it. It may not solve the problem, But it ends the suspense." - Steve Moonitz, DoD #2319, 1994