網(wǎng)站使用了cdn之后，騰訊企業(yè)郵箱無(wú)法通過(guò)phpmailer發(fā)送郵件。

<?php
header("content-type:text/html;charset=utf-8");
require_once './email.class.php';
$name = "iojdsfajijd";
$mobile = "13344448888";

if (!empty($name) && !empty($mobile)){
    $smtpserver = "smtp.exmail.qq.com";
    $smtpserverport = 25;
    $smtpusermail = "om@xxx.com";
    $smtpmailtos = array("xxx@qq.com");
    $smtpuser = "om@xxx.com";
    $smtppass = "mypassword";
    $mailsubject = "來(lái)源網(wǎng)頁(yè)：".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
    $mailbody = '';
    $br="\r\n";
    $mailbody .= "姓名:".$name.$br;
    $mailbody .= "電話:".$mobile.$br;
    $mailtype = "text";
    $smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);
    $smtp->debug = true;
    foreach ($smtpmailtos as $smtpmailto){
        $sendState=$smtp->sendmail($smtpmailto, $smtpusermail, $mailsubject,$mailbody,$mailtype);
    }
    // if ( $sendState==1 ){
    $list = array('name'=>$name,'tel'=>$mobile);
    $json = json_encode($list);
    echo $json;
    //}
}

CDN用百度云和加速樂(lè)都出現(xiàn)了這種問(wèn)題。我目前是用的百度云
我的郵件發(fā)送代碼如上，在沒用cdn的服務(wù)器上是可以正常發(fā)送郵件的，用了cdn之后，郵件發(fā)送出現(xiàn)如下報(bào)錯(cuò)：

Cannot connenct to relay host smtp.exmail.qq.com
Connection timed out (110)
Cannot send email to xxx@qq.com

解決過(guò)的辦法：
iptables 出端口全部綠燈
php版本：5.6 檢查了php.ini 和 allow_url_fopen = On，disable_function 沒用 fsock和fsockopen函數(shù)，請(qǐng)問(wèn)是怎么回事呢？求解答，謝謝