1. A computer implemented method for identifying undesirable electronic messages by a computer, the method comprising the steps of: identifying, by the computer, incoming electronic messages; normalizing, by the computer, identified electronic messages according to a plurality of rules for distinguishing non-legitimate words from legitimate words, said normalizing further comprising identifying non-legitimate words obfuscating electronic messages according to the plurality of rules, and deleting the identified non-legitimate words from the electronic messages; wherein said plurality of rules for distinguishing non-legitimate words from legitimate words comprises at least three rules from a group of rules consisting of: a rule specifying a maximum number of consecutive vowels in a legitimate word; a rule specifying a maximum number of consecutive consonants in a legitimate word; a rule specifying a maximum number of consecutive uses of any single character in a legitimate word; a rule specifying a maximum number of transitions between upper case letters and lower case letters in a legitimate word; a rule specifying a maximum length of a legitimate word containing numbers without punctuation; a rule specifying a maximum length of a legitimate word containing upper case letters, lower case letters and numbers; a rule specifying a maximum length of a legitimate word containing upper case letters, lower case letters, numbers and punctuation; a rule specifying a minimum number of vowels in a legitimate word; a rule specifying a minimum number of consonants in a legitimate word; a rule specifying a minimum ratio of vowels to consonants in a legitimate word; and a rule specifying a maximum ratio of vowels to consonants in a legitimate word; and analyzing, by the computer, normalized electronic message to identify undesirable electronic messages.