1. A method for analyzing character codes in text of a message to determine a probability that the message is spam, the method comprising: (a) receiving a message that includes character codes in text of the message; (b) identifying character codes of the text that are likely being used to obfuscate a word or phrase of the text; (c) deobfuscating each word or phrase of the text that is identified at step (b) as likely being obfuscated, to produce deobfuscated text; and (d) determining an extent that the character codes of the text are identified as likely being used to obfuscate a word or phrase of the text by determining one or more of the following a quantity of words or phrases identified at step (b) as likely being obfuscated; which particular words or phrases are identified at step (b) as likely being obfuscated, and (e) analyzing the deobfuscated text by comparing the deobfuscated text to text of one or more other messages known to be spam; (f) determining a probability that the message is spam based on both (i) results of the analyzing the deobfuscated text, by comparing the deobfuscated text to text of one or more other messages known to be spam, performed at step (e), and (ii) results of the determining the extent that the character codes of the text are likely being used to obfuscate a word or phrase of the text, performed at step (d); wherein at least steps (b), (c), (d), (e) and (f) are performed by one or more processors.
1. A method for analyzing character codes in text of a message to determine a probability that the message is spam, the method comprising: (a) receiving a message that includes character codes in text of the message; (b) identifying character codes of the text that are likely being used to obfuscate a word or phrase of the text; (c) deobfuscating each word or phrase of the text that is identified at step (b) as likely being obfuscated, to produce deobfuscated text; and (d) determining an extent that the character codes of the text are identified as likely being used to obfuscate a word or phrase of the text by determining one or more of the following a quantity of words or phrases identified at step (b) as likely being obfuscated; which particular words or phrases are identified at step (b) as likely being obfuscated, and (e) analyzing the deobfuscated text by comparing the deobfuscated text to text of one or more other messages known to be spam; (f) determining a probability that the message is spam based on both (i) results of the analyzing the deobfuscated text, by comparing the deobfuscated text to text of one or more other messages known to be spam, performed at step (e), and (ii) results of the determining the extent that the character codes of the text are likely being used to obfuscate a word or phrase of the text, performed at step (d); wherein at least steps (b), (c), (d), (e) and (f) are performed by one or more processors. 4. The method of claim 1 , wherein one of a plurality of rules used at step (f), when determining the probability that the message is spam, specifies that identifying some particular words or phrases as likely being obfuscated increases the probability that the message is spam more than identifying other particular words or phrases as likely being obfuscated.