1. A method for determining a sentiment of an electronic message, comprising: parsing, using a processor of a computer, the electronic message to identify one or more sub-constructs; for at least one of the sub-constructs that is not false-positive, assigning a sentiment indicator from a set of types of sentiment indicators; and assigning a score for the sentiment indicator; obtaining a final score for at least one type of sentiment indicator in the electronic message by summing scores for that type of sentiment indicator; and based on the final score for the at least one type of sentiment indicator, identifying a sentiment of the electronic message.