[求助]Scalix外发邮件问题

lwind

装了个社团版的Scalix,安装完毕后使用Web方式测试了一下,发现如下问题:
1. 可以接收外部邮箱发送的信件.
2. 使用WEB邮箱向外部邮箱发送信件时,一些外部邮箱收信正常,一些(如 gmail, hotmail,live邮箱)却报如下错误,退信:

The original message was received at Sun, 16 Dec 2007 16:59:03 +0800
from localhost.localdomain [127.0.0.1]

----- The following addresses had permanent fatal errors -----
<username@gmail.com>
(reason: 550-5.7.1 [aa.bb.cc.dd] The IP you're using to send email is not authorized )
<username@gmail.com>
(reason: 550-5.7.1 [aa.bb.cc.dd] The IP you're using to send email is not authorized )

----- Transcript of session follows -----
... while talking to gmail-smtp-in.l.google.com.:
>>> DATA
<<< 550-5.7.1 [aa.bb.cc.dd] 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. b21si5062906rvf
554 5.0.0 Service unavailable

难道是我的IP被封了?

lwind

都没人遇到这样的问题吗?
自己顶上去