为什么发送给QQ邮箱的邮件全部被退回了

今天测试博客的邮件，结果发给qq邮箱的测试邮件全部给退回了
而发给其他邮箱一点事都没有。
后来登陆上邮箱看到：
This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:   128****446@qq.com     host mx3.qq.com [203.205.160.43]     SMTP error from remote mail server after RCPT TO:<128****446@qq.com>:     550 Ip frequency limited. http：//service.mail.qq.com/cgi-bin/help?subtype=1&&id=20022&&no=1000725