ConstMatches a string that conforms to the email address format specified in RFC 5322. This regular expression allows for alphanumeric characters, special characters and domain names. Use this regular expression to validate email addresses input by users or to extract email addresses from strings. Source: https://www.w3.org/TR/2012/WD-html-markup-20121025/input.email.html#form.data.emailaddress_xref2
Regular expression that matches an email address.