imail不能发送给sina,hotmail的问题求助

linker

最近刚装,发现不能发到sina,hotmail,而别的是可以发的.

sina的邮件提示发出去了,但是发现邮件内容还在列表里.
发送日志:
03:15 21:34 SMTP-(4b5a00000188e553) Trying vip.sina.com (0)
03:15 21:34 SMTP-(4b5a00000188e553) Connect vip.sina.com [202.108.3.203:25] (1)
03:15 21:34 SMTP-(4b5a00000188e553) 554 vip2-173.sina.com
03:15 21:34 SMTP-(4b5a00000188e553) SMTP_DELIV_FAILED
03:15 21:34 SMTP-(4b5a00000188e553) >QUIT

hotmail的邮件也发不出去,退信可以立即收到.
内容如下:
undeliverable to tzlinker@hotmail.com

Server response to MAIL FROM:
550 Your e-mail was rejected for policy reasons on this gateway. Reasons for rejection may be related to content such as obscene language, graphics, or spam-like characteristics (or) other reputation problems. For sender troubleshooting information, please go to http://postmaster.msn.com.  Please note: if you are an end-user please contact your E-mail/Internet Service Provider for assistance.



请高手帮忙看看是什么原因.谢谢

dlblq

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