It was somewhat quiet day on the Internet today as far as the bad guys go.  We did however receive some really good emails in the mailbag with interesting tid-bits.  One that I particularly liked was one sent to us by one of our faithful readers, Chris Edwards.  He was commenting on spam filtering and included a link to an article at:
http://www.cl.cam.ac.uk/~rnc1/extrusion.pdf

This is an excellent article by Richard Clayton, University of Cambridge in the UK.  I am very intrigued by the information that was supplied in this article.  Richard has provided some very helpful tips.  Thanks Chris for bringing this to our attention.