和163信息收发都正常，和Gmail只回复过一次能接收到，其他发送的几个和回复Gmail都不能收到。退信内容如下：

引用:

无法将您的邮件投递至以下指定地址:
hu.yinglong@gmail.com : 550-5.7.1 [218.80.132.204] The IP you're using to send mail is not authorized550-5.7.1 to send email directly to our ser


----- Original message follows.

Received: Mon, 5 May 2008 15:58:36 +0800
From: admin <admin@5x54.com>
To: hu.yinglong@gmail.com
Subject: Re: test
Date: Mon, 5 May 2008 15:58:36 +0800
Mime-Version: 1.0
X-MSMail-Priority: Normal
Content-Type: text/plain; charsetgB2312"
Content-Transfer-Encoding: quoted-printable

你的IP例入PBL  请到这里解除：
http://www.spamhaus.org/pbl/index.lasso

顶下