www.BlackViper.com: E-Mail Filtering Guide

Image 2.5

13) This filter detects "Diet" spam key words in the subject line. (Image 2.5)

Here I am looking for particular words in the subject line and highlighting the message Red, then moving it to the "SPAM" folder. This is a visual cue that the E-Mail used "bad" words and probably did not come from an actual person.