Pacicio

The function works only if I add “verify_peer_name”, too.

add_filter('wp_mail_smtp_custom_options','my_wp_mail_smtp_custom_options');

function my_wp_mail_smtp_custom_options($phpmailer) {
	$phpmailer->SMTPOptions = [
		'ssl' => [
			'verify_peer' => false,
			'verify_peer_name' => false
		]
	];
	return $phpmailer;
}

Thanks!