Comparing E-mail Address Validating Regular Expressions
Updated: 2/3/2012 Summary This page compares regular expressions that validate e-mail addresses in order to find the best one. The expression with the best score is currently the one used by PHP's filter_var(), which is based on a regex by Michael Rushton: /^(?!(?:(?:\x22?\x5C[\x00-\x7E]\x22?)|(?:\x22?[^\x5C\x22]\x22?)){255,})(?!(?:(?:\x22?\x5C[\x00-\x7E]\x22?)|(?:\x22?[^\x5C\x22]\x22?)){65,}@)(?:
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