用Icewarp发信出现 Helo command rejected: need fully-qualif如何解决？

samabc

邮件不能发出：
出错信息如下：
The original message was received at Fri, 07 Sep 2012 15:35:22 +0800

----- The following addresses had permanent fatal errors -----
<XXX@XXX.com>

----- Transcript of session follows -----
.. while talking to mail.xxx.com
>>> RCPT To:<XXX@XXX.com>
<<< 504 5.5.2 <localhost>: Helo command rejected: need fully-qualified hostname

---

Reporting-MTA: DNS; localhost
Arrival-Date: Fri, 07 Sep 2012 15:35:22 +0800

Original-Recipient: RFC822; <XXx@XXX.com>
Final-Recipient: RFC822; <XXX@XXX.com>
Action: failed
Remote-MTA: DNS; mail.xxx.com
Last-Attempt-Date: Fri, 07 Sep 2012 15:35:22 +0800
哪位大哥帮帮小弟解决这个问题。