这种情况SENDMAIL应该怎么设置?

这种情况SENDMAIL应该怎么设置?

我在局域网,只有IP,GATEWAY,DNS.没有域名.我用KMAIL发送,用自己机器上的SENDMAIL做SMTP服务.我发送信件的时候出现一下信息:
(我向我的一个信箱发送邮件)
____________________________________________________________nscript of session follows -----
... while talking to mx6.chinaren.com.:
>>> MAIL From:<root@localhost.localdomain>
<<< 553 sorry, your envelope sender domain must exist
501 5.6.0 hexinchao@chinaren.com... Data format error

--f4N2LG501366.990584476/localhost.localdomain
Content-Type: message/delivery-status

Reporting-MTA: dns; localhost.localdomain
Received-From-MTA: DNS; localhost
Arrival-Date: Tue, 22 May 2001 22:21:06 -0400

Final-Recipient: RFC822; hexinchao@chinaren.com
Action: failed
Status: 5.1.3
Diagnostic-Code: SMTP; 553 sorry, your envelope sender domain must exist
Last-Attempt-Date: Tue, 22 May 2001 22:21:16 -0400

--f4N2LG501366.990584476/localhost.localdomain
Content-Type: message/rfc822

Return-Path: <root>
Received: from localhost (localhost [[UNIX: localhost]])
        by localhost.localdomain (8.11.2/8.11.2) id f4N2L6601364
        for hexinchao@chinaren.com; Tue, 22 May 2001 22:21:06 -0400
Content-Type: text/plain;
  charset="gb2312"
From: takethat <hexinchao@263.net>
To: hexinchao@chinaren.com
Subject: test
Date: Tue, 22 May 2001 22:21:03 -0400
X-Mailer: KMail [version 1.2]
MIME-Version: 1.0
Message-Id: <01052222210300.01350@takethat>
Content-Transfer-Encoding: 8bit
这个是我的原文:{
test
--
SYSTEM IS HALTING.........
}
--f4N2LG501366.990584476/localhost.localdomain--
____________________________________________________________
不知道应该怎么设置. 请仔细说明一下.我对网络设置一点也不懂.我看过很多文章,都要域名.我没有,不知道怎么办!
      
你可以用dns做一个虚拟域名