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Re: Extremely High Spam Statistics
From: Mark Bruhn <mbruhn () INDIANA EDU>
Date: Tue, 13 Feb 2007 10:11:51 -0500

The email addresses in our online directory have been images for several
years.  (http://people.iu.edu).  Works very well, and I don't know of many

We see about 30,000,000 connect attempts per day, and sampling that shows a
pretty steady spam rate of 87%.  That includes rejected connects and
messages identified as spam by Puremessage (those messages go into a user's
junk/spam folder, and are deleted after 5 days).


Mark S. Bruhn
Associate Vice President for Telecommunications
Executive Director, REN-ISAC
Office of the Vice President for Information Technology and CIO
Indiana University

From: Ken Connelly <Ken.Connelly () UNI EDU>
Reply-To: The EDUCAUSE Security Discussion Group Listserv
Date: Tue, 13 Feb 2007 08:55:47 -0600
Subject: Re: [SECURITY] Extremely High Spam Statistics

Roger Safian wrote:
At 06:51 PM 2/12/2007, Tim Lane put fingers to keyboard and wrote:


I would be interested in comparing our spam stats with other institutions.
We are currently sent around around 450 000 emails per day, of which 98-99%
are spam leaving around 5000 valid email messages passed through.  This is
transparent to our uses who only receive valid email.

Are other institution's spam levels this high?  I would be very interested
in hearing stats as I thought global rates were only around 90-95%.

Your levels on spam seem high to me.  I'd suggest that you change your public
directory to not include email address in plain text.  You can obfuscate
see our directory for an example.

ooh, that's...  interesting.  How long have you been doing that and do
you get complaints about it?  Anyone else doing similar things?

- Ken
Ken Connelly             Associate Director, Security and Systems
ITS Network Services                  University of Northern Iowa
email: Ken.Connelly () uni edu   p: (319) 273-5850 f: (319) 273-7373

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