outlook2007 系统老给我发邮件退信，详细如图， 请问怎么解决啊

-----邮件原件-----

发件人: Mail Delivery System [mailto:Mailer-Daemon@yozuri.ipslanetwork.net]

发送时间: 2010年12月26日 15:19

收件人:本人邮箱

主题: Warning: message 1PVegr-0000Q4-6p delayed 72 hours

This message was created automatically by mail delivery software.

A message that you sent has not yet been delivered to one or more of its

recipients after more than 72 hours on the queue on yozuri.ipslanetwork.net.

The message identifier is:1PVegr-0000Q4-6p

The date of the message is:23 Dec 2010 14:30:39 +0800

The subject of the message is: =?utf-8?B?6YCB57uZ5L2g55qE?=

The address to which the message has not yet been delivered is:

svtuityi@20010peixun.gicp.net

No action is required on your part. Delivery attempts will continue for

some time, and this warning may be repeated at intervals if the message

remains undelivered. Eventually the mail delivery software will give up,

and when that happens, the message will be returned to you.