/**
* Determines if the email address is an email address in an open domain. These are
* addresses that users can sign up for, typically free. They then has to login to
* these address to get the emails. These are not considered to be
* disposable emails, however, if the application is providing a free
* trial for an expensive server, then users can signup for more accounts
* to get further trials.
*
* If applications are to block these addresses, it is important to be aware
* that some users use open webmail as their primary email and that such
* service providers include hotmail, gmail, and yahoo.
*
* @param $p_email The email address to check.
* @returns true: open domain email, false: otherwise.
*/
public static function is_open_email($p_email)
{
$t_domain = DisposableEmailChecker::_get_domain_from_address($p_email);
if (DisposableEmailChecker::$open_domains_array === null) {
DisposableEmailChecker::$open_domains_array = DisposableEmailChecker::_load_file('open_domains');
}
return in_array($t_domain, DisposableEmailChecker::$open_domains_array);
}
