Email does not send to hostgator addresses

I'm configuring email sending in wordpress without plugin with native wpmail, however I can not send it to a hostgator email address, when I send it to gmail or another provider it works perfectly, however for unknown addresses that is, that they are different from gmail, outlook, hotmail etc ... Nothing comes, is there any configuration?

Follow the code of what I did in wp-config.php, I removed the part of the password for security

/* Mail Config */
define( 'SMTP_HOST', 'cheapremovals.com' );  // A2 Hosting server name. For example, "a2ss10.a2hosting.com"
define( 'SMTP_AUTH', true );
define( 'SMTP_PORT', '465' );
define( 'SMTP_SECURE', 'ssl' );
define( 'SMTP_USERNAME', '[email protected]' );  // Username for SMTP authentication
define( 'SMTP_FROM',     '[email protected]' );  // SMTP From address
define( 'SMTP_FROMNAME', 'Cheap Removals' );         // SMTP From name

and in functions.php I put this

add_action( 'phpmailer_init', 'send_smtp_email' );
function send_smtp_email( $phpmailer ) {
    $phpmailer->isSMTP();
    $phpmailer->Host       = SMTP_HOST;
    $phpmailer->SMTPAuth   = SMTP_AUTH;
    $phpmailer->Port       = SMTP_PORT;
    $phpmailer->SMTPSecure = SMTP_SECURE;
    $phpmailer->Username   = SMTP_USERNAME;
    $phpmailer->Password   = SMTP_PASSWORD;
    $phpmailer->From       = SMTP_FROM;
    $phpmailer->FromName   = SMTP_FROMNAME;
}