求救，dede 发送邮件，制定邮箱接收不到

请教个问题我做了个订单，用户填写后，订单直接发送到指定的邮箱本地做发送邮件测试成功，指定邮箱也能收到邮件但是上传到万网空间只提示发送成功，但邮箱却收不到邮件是怎么回事啊？

<hprequire_once(dirname(__FILE__)."/../include/common.inc.php");$mailbody = '';$mailtitle = "111111111";$mailbody = "标题222222222 ";$mailbody.= "网名：33333333333 ";$mailbody.= "电子邮箱：444444444444 ";$mailbody.= "留言内容：55555555555 "; // $headers = "From: ".$cfg_adminemail."\r\nReply-To: ".$cfg_adminemail; $email="106873970@qq.com"; //$mailtype = 'HTML'; require_once(DEDEINC.'/mail.class.php'); //$smtp = new smtp($cfg_smtp_server,$cfg_smtp_port,true,$cfg_smtp_usermail,$cfg_smtp_password); $smtp = new smtp(" smtp.qq.com ","25",true,"106873970@qq.com","*******"); $smtp->debug = false; $smtp->sendmail($email,"邮件测试","106873970@qq.com", $mailtitle, $mailbody, $mailtype);ShowMsg("谢谢!邮件发送成功!我们会尽快给您回复!","/");exit();?>我直接把参数都写php里了，本地执行106873970@qq.com收到了。上传的万网就不行，提示发送成功，邮箱收不到