下面这段英语什么意思 麻烦高手翻译一下.谢谢

下面这段英语什么意思 麻烦高手翻译一下.谢谢
This is a MIME-encapsulated message
The original message was received at Fri, 11 Apr 2008 16:33:25 +0800
from [125.120.149.149]
----- The following addresses had permanent fatal errors -----

(reason: 550 Host unknown)
----- Transcript of session follows -----
550 5.1.2 ... Host unknown (Name server: huilingroup.com: host not found)
Reporting-MTA: dns; ns.brightsys.com
Received-From-MTA: DNS; [125.120.149.149]
Arrival-Date: Fri, 11 Apr 2008 16:33:25 +0800
Final-Recipient: RFC822; webmaster@huilingroup.com
Action: failed
Status: 5.1.2
Remote-MTA: DNS; huilingroup.com
Diagnostic-Code: SMTP; 550 Host unknown
Last-Attempt-Date: Fri, 11 Apr 2008 16:33:41 +0800