OT: Spam

[Bill Campbell]

On Fri, Jan 14, 2011, Ken Cole wrote:
>I was in a review meeting this morning and we were given some stats
>that were nearly unbelievable about spam that I just had to share as a
>bit of a quiz.
>
>Our company through its email portal receives approximately 3 billion emails:
>
>1. Per Month
>2. Per Quarter
>3. Per Year
>
>The percentage delivered (not spam) is:
>
>1. 3.7%
>2. 37%
>3. 73%
>
>It will be interesting to see what people think. :)

I can't say that I understand your breakdown above.

I think the conventional wisdom is that spam is about 90% of all
e-mail on the Internet.

At one of our ISP customers with about 10,000 e-mail users, their
border MX server rejects about 2,000,000 delivery attempt a *DAY*.
It delivers aroud 25,000 messages that get by the DNSRBLs, and
other IP based tests such as there must be reverse DNS, the host
name returned by rDNS must have the connecting IP listed as valid
for that host name, ...

There has been a marked downturn in spam levels over the last
month or so.  I haven't seen anything but guesses amongst the
anti-spammers as to why this is so.  A few of the major botnets
have been shut down for a while.

My totally unfiltered postmaster folder typically has about 400
messages when I start the day, accumulated from about midnight
until some reasonable hour in the morning.

I will typically find around 20 messages in my spam folder in the
morning.  This folder contains messages that are above my
spamassassin threshhold, and below the one where I don't even
want to look at it for false positives.

Bill
-- 
INTERNET:   bill at celestial.com  Bill Campbell; Celestial Software LLC
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