发给上汽的邮箱都被拦截，怎么回事啊

您好！
发给其他公司的都没有问题，就上汽的有问题。
我能接受，不能发送。

您发送的邮件被退回，相关信息如下：

发件人：shi***@sigent.cn
主题：回复： 咨询退信-----转发: 来自postmaster@free.net.cn的退信
原文：邮件原文包含在附件中。
时间：Mon, 22 May 2017 14:46:23 +0800

无法发送到*@saicmotor.com

系统应答：(3)the mta server of saicmotor.com -- mail1.saicmotor.com(202.96.219.11) reply:550 Rejecting for Sender Policy Framework at 2017-05-22 14:46:25
退信原因：收件方地址不存在，或暂时不可用，导致邮件被系统退回。
解决建议：1. 请检查输入的收件方地址是否有误；2. 请联系收件方确认其域名MX是否存在,指向是否正确；3. 请联系收件方确认其邮箱使用状态，是否存在过期、被禁用或冻结等情况。

Sorry to bounce your email, Information related below:

Sender: shi***@sigent.cn
Subject: 回复： 咨询退信-----转发: 来自postmaster@free.net.cn的退信
Original: Original email has been attached.
Date: Mon, 22 May 2017 14:46:23 +0800

Can not deliver to *@saicmotor.com

Reply:(3)the mta server of saicmotor.com -- mail1.saicmotor.com(202.96.219.11) reply:550 Rejecting for Sender Policy Framework at 2017-05-22 14:46:25
Reason:The Email address of the recipient does not exist, or is temporarily unavailable.
Solution:1.Please check if the Email address of the recipient is correc;2.Please check if the Email address of the recipient is correct;3.Please contact the recipient to check if the MX of his domain exists, or is correct;4.Please contact the recipient to check if the status of his Email address is abnormal, such as overdue, disabled, freezing and so on.