How to properly validate email addresses in Java

If you are using Java, the InternetAddress class will validate your emails against the RFC 822 standard. The function below will filter out most invalid emails quickly:

public static boolean isValidEmailAddress(String email) {
    try {
        new InternetAddress(email).validate();
    } catch (AddressException ex) {
        return false;
    }
    return true;
}

This regex will also match email adresses. However, it’s not bulletproof. Emails such as n@n.n or ____@--... would still pass validation.

/^([a-z0-9_\.\+-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/