How to create PHPMailer mx blacklist

I send email via php script + phpmailer

I want to make blacklist mx records check in phpmailer. For example,

If email info@mail.com has in mx record domain company.com or company1.com - my script shouldn't send email to this info@mail.com

I need only mx check before sending email, not domain check in info@mail.com

Is it real?

Solution

i dont know the details of phpmailer, but a generic algorithm is:

$host = "gmail.com";
$black = array("mail.anexample.com","mail.otherexample.com");
////////
$mxarr = array();
getmxrr($host, $mxarr);
$intersect = array_intersect($mxarr, $black);
if(!count($intersect)>0) {
    echo "ok";
    //sendmail(......);
}