急：CentOS4.4下的postfix发信问题

hxzhyx

1、gmail:

   To xxxxx@gmail.com Msg="host gmail-smtp-in.l.google.com[209.85.147.114] said: 550-5.7.1 [60.xxx.xxx.xxx] The IP you're using to send email is not authorized  550-5.7.1 to send email directly to our servers. Please use  550 5.7.1 the SMTP relay at your service provider instead. l27si65493waf (in reply to end of DATA command" : 1 Time(s)

2、另外的分公司:

   To xxxxx@xxxxx.com Msg="host mail.xxxxxx.com[218.xxx.xxx.xxx] said: 550 5.7.1 Requested action not taken: message refused (in reply to end of DATA command" : 1 Time(s)

3、Hotmail:

   To xxxxx@hotmail.com Msg="host mx1.hotmail.com[65.54.245.8] said: 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" : 1 Time(s)

拜请各位给帮忙看看什么原因，怎样才能解决，谢了！


比较详细一点的报告：

This is the Postfix program at host nbjiateng.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                        The Postfix program

<xxx@xxx.com>: host mail.xxx.com[218.xx.xx.xx] said: 550 5.7.1
    Requested action not taken: message refused (in reply to end of DATA
    command)

Reporting-MTA: dns; xxxx.com
X-Postfix-Queue-ID: B0A902659D4
X-Postfix-Sender: rfc822; xx@xxxx.com
Arrival-Date: Tue, 12 Jun 2007 10:33:10 +0800 (CST)

Final-Recipient: rfc822; xxx@xxx.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host mail.xxx.com[218.xx.xx.xx] said: 550
    5.7.1 Requested action not taken: message refused (in reply to end of DATA
    command)