关于SPF请教

supporter

最近发送邮件都被打回来
显示因为SPF问题。
在DNS中也添加了SPF记录
可是还是不行。
回信如下
did not reach the following recipient(s):
hope_mx@hotmail.com on Mon, 15 Dec 2008 22:57:09 +0800
    收件人电子邮件服务器出现 SMTP 通信问题。请与系统管理员联系。
    <bluec-mail.bluec.cn #5.5.0 smtp;550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems.
If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and
support>

钉子

上面的退信没有明确说是因为SPF记录的问题呀。