조금 도움이 될까해서 적어드립니다.
다른건 모르겠구 밑에 Transcript of session에 보면 네임서버가 안잡힌것으로 나옵니다.
다른 유저들의 편지들이 모두 재부팅할때 반송되는 것도 보면 서버의 네임서버를 잡지
않아서 나오는 결과라고 보구 싶네요, 네임서버를 잡아보세요.
  
:
: Subject:Returned mail: Cannot send message within 5 days
: Date: Wed, 19 Jul 2000 22:08:38 +0900
: From:Mail Delivery Subsystem <MAILER-DAEMON at localhost.localdomain>
: To:<xx at xx.xx.xx>
:
:
:
:
: The original message was received at Thu, 13 Jul 2000 15:39:39 +0900
: from IDENT:xx@[xxx.xx.xx.xx]
:
: ----- The following addresses had permanent fatal errors -----
: <yy at yy.yy.yy.yy>
:
: ----- Transcript of session follows -----
: 451 <xx at xx.xx.xx>... xx.xx.xx: Name server timeout
: 451 <xx at xx.xx.xx>... xx.xx.xx: Name server timeout
: 451 <yy at yy.yy.yy.yy>... yy.yy.yy.yy: Name server timeout
: 451 <xx at xx.xx.xx>... xx.xx.xx: Name server timeout
: Message could not be delivered for 5 days
: Message will be deleted from queue
: 451 <xx at xx.xx.xx>... xx.xx.xx: Name server timeout
:
:
:
:
: Reporting-MTA: dns; localhost.localdomain
: Arrival-Date: Thu, 13 Jul 2000 15:39:39 +0900
:
: Final-Recipient: RFC822; yy at yy.yy.yy.yy : Action: failed
: Status: 4.4.7
: Last-Attempt-Date: Wed, 19 Jul 2000 22:08:38 +0900
:
:
:
:
: Return-Path:<xx at xx.xx.xx>
: Received: from xx.xx.xx (IDENT:xx@[xx.xx.xx.xx])
: by localhost.localdomain (8.9.3/8.9.3) with ESMTP id PAA08500;
: Thu, 13 Jul 2000 15:39:39 +0900
: Sender: root
: Message-ID:<396D6344.86D528C1 at xx.xx.xx>
: Date: Thu, 13 Jul 2000 15:35:48 +0900
: From: xx <xx at xx.xx.xx>
: Organization: xxxx
: X-Mailer: Mozilla 4.61 [ko] (X11; I; Linux 2.2.12-20kr i686)
: X-Accept-Language: ko
: MIME-Version:1.0
: To: =?EUC-KR?B?wM6/tcDM?= <xx at xx.xx.xx>,
: =?EUC-KR?B?sei9wsjx?= <aa at aa.aa>,
: =?EUC-KR?B?seiwob+1?= <bb at bb.bb>,
: =?EUC-KR?B?sO3H9sGk?= <yy at yy.yy.yy.yy>
: <cc at cc.cc>, =?EUC-KR?B?sei/rMiv?= <dd at dd.dd>,
: =?EUC-KR?B?t/m/rMjx?= <ee at ee.ee>,
: =?EUC-KR?B?wbbH9rnO?= <ff at ff.ff>
: Subject: =?EUC-KR?B?s9HA277StNkuLg==?=
: Content-Type: multipart/mixed;
: boundary="------------55445E54CC5DAECF856FB4A7"