13. A machine-readable storage medium including instructions executable by one or more processors to analyze character codes in text of a message to determine a probability that the message is spam, machine-readable storage medium comprising: instructions to receive a message that includes character codes in text of the message; instructions to identify character codes of the text that are likely being used to obfuscate a word or phrase of the text; instructions to deobfuscate each word or phrase of the text that is identified as likely being obfuscated, to produce deobfuscated text; instructions to determine 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 as likely being obfuscated, and which particular words or phrases are identified as likely being obfuscated; instructions to analyze the deobfuscated text by comparing the deobfuscated text to text of one or more other messages known to be spam; and instructions to determine a probability that the message is spam based on both (i) results of analysis of the deobfuscated text by comparing the deobfuscated text to text of one or more other messages known to be spam, and (i) results of determining the extent that the character codes of the text are likely being used to obfuscate a word or phrase of the text.
13. A machine-readable storage medium including instructions executable by one or more processors to analyze character codes in text of a message to determine a probability that the message is spam, machine-readable storage medium comprising: instructions to receive a message that includes character codes in text of the message; instructions to identify character codes of the text that are likely being used to obfuscate a word or phrase of the text; instructions to deobfuscate each word or phrase of the text that is identified as likely being obfuscated, to produce deobfuscated text; instructions to determine 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 as likely being obfuscated, and which particular words or phrases are identified as likely being obfuscated; instructions to analyze the deobfuscated text by comparing the deobfuscated text to text of one or more other messages known to be spam; and instructions to determine a probability that the message is spam based on both (i) results of analysis of the deobfuscated text by comparing the deobfuscated text to text of one or more other messages known to be spam, and (i) results of determining the extent that the character codes of the text are likely being used to obfuscate a word or phrase of the text. 18. The machine-readable storage medium of claim 13 , wherein: the instructions to identify character codes of the text that are likely being used to obfuscate a word or phrase of the text, include instructions to identify one or more words that are likely misspelled; the instructions to deobfuscate any word or phrase of the text that is likely being obfuscated, to produce deobfuscated text, include instructions to replace one or more words that are likely misspelled with one or more words that were likely intended if the one or more words were correctly spelled; the instructions to determine a probability that the message is spam include instructions to search the deobfuscated text for words and phrases that are known to be used in spam, and instructions that take into account whether one or more word that is likely misspelled is a word or is part of a phrase that is known to be used in spam.