* The function used to validate email addresses. Note that this is a very basic validation -- complete
* validation per the email RFC specifications is very complex and beyond the scope of this class, although
* this function can be overridden if a more comprehensive validation scheme is desired. See the validation
* The function used to validate email addresses. Note that this is a very basic validation -- complete
* validation per the email RFC specifications is very complex and beyond the scope of this class, although
* this function can be overridden if a more comprehensive validation scheme is desired. See the validation