original artickle: http://www.cambiaresearch.c... public bool TestEmailRegex(string emailAddress) { // string patternLenient = @"\w+([-+.]\w+)*@\w+([-.]\w... // Regex reLenient = new Regex(patternLenient); string patternStrict = @"^(([^<>()[\]\\.,;:\... + @"(\.[^<>()[\]\\.,;:\... + @"((\[[0-9]{1,3}\.[0-9]{1,3... + @"\.[0-9]{1,3}\])|(([a-zA-Z...