问：很抱歉您发送的邮件被退回，以下是该邮件的相关信息：
被退回邮件主 题：转发：答复: 放行：RE: SO#GGZ: S / GSIW 1*20gp sz -lunadaBY CMA—1*20\’GP Ex Yantian to LUANDA,ANGOLA
时 间： 16:19:51无法发送到 g.com退信原因未知原因
host mx1.yunyou.top[127.0.0.1] said: 451 4.7.1 Try again later (in reply to end of DATA command)解决方案请联系您的收件人（w）或其所在服务商了解退信原因。 您也可以向管理员报告此退信。发送尝试已经持续进行了 4 小时。不会再有任何动作来尝试发送你的邮件了。请联系你的系统管理员或先通过其它非电子邮件的方式向你的朋友发送信息以免耽误。此外，您还可以 点击这里 获取更多关于退信的帮助信息。==============================发件人：Mainfreight Email Gateway Notification<>
时 间：2019年1月31日(星期四) 下午5:17收件人：Summer Huang (MFI Shenzhen)<>
This message is a warning that an email you are trying to send
has not yet been delivered. You do not have to do anything yet
as the email is still queued for delivery.
An email you addressed to email address :
— warren@leodrilling.com
has not yet been delivered. The problem appears to be :
— Recipient server unavailable or busy
Additional information follows :
— 4.7.1 Try again later
This condition occurred after 6 attempt(s) to deliver over
a period of 1 hour(s).
You will receive a rejection notice after a maximum of 4 days
if the email cannot be delivered. If you sent the email to multiple
recipients you will receive one of these messages for each one
which is still undelivered, otherwise they have been sent.
,我收不到朋友发的邮件
答：您好，核实是被当做垃圾邮件拦截了，您可以登陆web 查看到邮件，并取回，您可以将域名加入白名单，这样就不会被当做垃圾邮件,非常感谢您长期对我司的支持.由此给您带来的不便之处,敬请原谅!谢谢!
