Hi, Murray,
On 2/8/11 8:31 PM, Murray S. Kucherawy wrote:
A few statistics OpenDKIM captured recently that might amuse some of you:
Interesting figures!
1) There's a slow but steady increase in signed message rates:
http://www.opendkim.org/stats/report.html#signing_trend (ignore the
first row, that month was skewed; also the current month is, of
course, incomplete)
Good news! Although... we don't know whether the increase is due to
spammers that adopt DKIM or legit senders adopting DKIM.
2) "To:" is now far and away the most munged header field invalidating
signatures: http://www.opendkim.org/stats/report.html#broken_headers
3) Overall pass rates are pretty high, even when they transit MLMs:
http://www.opendkim.org/stats/report.html#passfail
What I don't understand here, what's what. I see four figures:
Signatures: 1362786 Ignored: 482 Pass: 1275158 Failed (body): 16027
But this row does not provide the correct pass/fail rate in total, does
it? I thought the pass rate was (1,362,786 - 16,020) / (1,362,786), or
if we subtract the ignored: (1,362,786 - 482 - 16,020) / (1,362,786).
This, however, is not correct: the number of failed is not the total
number of failed, only the body failed (as is indicated). Is it possible
to add a fifth figure: failed (header), to this row in order to have a
complete list of figures?
4) Oddly, signed messages with huge numbers of Received: header fields
almost always pass verification, including one with 39 of them:
http://www.opendkim.org/stats/report.html#received_correlation (let's
see SPF do that!),
+1
though that message was ultimately rejected for having too many
Received: fields.
Too bad ;-)
/rolf
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