Commtouch, makers of enterprise and ISP level anti-spam solutions,
announced this week that it has acquired a patent which describes “a
system that monitors live e-mail, identifies certain characteristics of
the e-mail messages that appear in more than one e-mail, and blocks
other e-mails with the same pattern.”

Holy infringement, Batman! That sure sounds like more than a few
anti-spam products out there.

Commtouch has been quoted as saying that they “will begin offering
licenses of the patent to other anti-spam companies; the starting date
for the licensing push and the terms have not been decided.” [...]