They are not from any particular IP. 3 that I looked at came from a Bell South IP, an IP in RIPE, and an IP in APNIC. Seems to be a bot network.
My best guess is that this is meant to poison the statistics of bayesian mail filters and trick them into letting spam through. ------------------------------------------------------------------------------ This List Sponsored by: Black Hat Attend the Black Hat Briefings & Training USA, July 29. August 3 in Las Vegas. World renowned security experts reveal tomorrow.s threats today. Free of vendor pitches, the Briefings are designed to be pragmatic regardless of your security environment. Featuring 36 hands-on training courses and 10 conference tracks, networking opportunities with over 2,500 delegates from 40+ nations. http://www.blackhat.com ------------------------------------------------------------------------------
