Could Post to Moderator group because of Sendmail

[w2kjun at corp.thrunet.com]

I cant post my article to moderator group in our servers.

Error messages like this..

5.1.8 bad sender address....what shall i do?


   ----- The following addresses had permanent fatal errors -----
fr-comp-os-linux-configuration at moderators.isc.org

   ----- Transcript of session follows -----
... while talking to sprettur.isnet.is.:
>>> MAIL From:<news at nntpko> SIZE=186
<<< 501 5.1.8 <news at nntpko>... Domain of sender address news at nntpko does
not exi
st
501 fr-comp-os-linux-configuration at moderators.isc.org... Data format error

--PAA27031.985933727/nntpko
Content-Type: message/delivery-status

Reporting-MTA: dns; nntpko
Arrival-Date: Fri, 30 Mar 2001 15:28:30 +0900 (KST)

Final-Recipient: RFC822; fr-comp-os-linux-configuration at moderators.isc.org
Action: failed
Status: 5.5.2
Remote-MTA: DNS; sprettur.isnet.is
Diagnostic-Code: SMTP; 501 5.1.8 <news at nntpko>... Domain of sender address
news@
nntpko does not exist
Last-Attempt-Date: Fri, 30 Mar 2001 15:28:47 +0900 (KST)

--PAA27031.985933727/nntpko
Content-Type: message/rfc822

Return-Path: <news>
Received: (from news at localhost)
        by nntpko (8.8.8+Sun/8.8.8) id PAA27016
        for fr-comp-os-linux-configuration at moderators.isc.org; Fri, 30 Mar
2001
15:28:30 +0900 (KST)
To: fr-comp-os-linux-configuration at moderators.isc.org
Path: not-for-mail
From: "yoon" <w2kjun at korea.com>
Newsgroups: fr.comp.os.linux.configuration
Subject: LINUX is Good
Date: Fri, 30 Mar 2001 15:31:09 +0900
Organization: korea usenet service
Lines: 3
Message-ID: <9a190i$qc6$1 at nntpko.korea.com>
NNTP-Posting-Host: 210.117.24.33
X-Trace: nntpko.korea.com 985933650 27014 210.117.24.33 (30 Mar 2001
06:27:30 GM
T)
X-Complaints-To: usenet at newsgroup.korea.com
NNTP-Posting-Date: 30 Mar 2001 06:27:30 GMT
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 5.50.4133.2400
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400