메일이 보내지는데두있구 안보네지는데두 있어요(도와주세요

    서버에 대해서 잘 모른데요...

메일을 보냈는데...리턴이 됩니다...잘나가던 메일이라는데 한 10일정도 전부터

이쪽 메일로 안나갑니다. 여러가지로 찾아봤는데...

웹메일..hanmail이나 네띠앙 메일에서는 이쪽으로 메일이 보내집니다.

이쪽저쪽 강좌나..센드메일에 관련된 글을 읽고 찾아 봤는데.

mx두 되어있고...zone에서도 확인도 했고...access의 relay도 봤는데...

도대체 답이 안나 오네요...참 답답합니다..

메일이 다 안되는 것두 아니구요...한메일,라이코스,하이텔

여기는 메일이 나가구...받아지구 하거든요...

무슨 문제 일까요??

1.

    **********************************************
    **      THIS IS A WARNING MESSAGE ONLY      **
    **  YOU DO NOT NEED TO RESEND YOUR MESSAGE  **
    **********************************************

The original message was received at Mon, 27 May 2002 11:02:50 +0900
from [xx.xxx.xxx.x]

   ----- The following addresses had transient non-fatal errors -----
<jumpei_hirosato@hq.mhi.co.jp>

   ----- Transcript of session follows -----
451 hq.mhi.co.jp: Name server timeout
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old

2.후...여기는..relay문제인가요..

The original message was received at Tue, 28 May 2002 11:02:57 +0900
from [xx.xxx.xxx.x]

   ----- The following addresses had permanent fatal errors -----
<laputan@kr.psi.net>
    (reason: 553 5.3.0 OpenSpamRelay blocked see: http://ordb.org/)

   ----- Transcript of session follows -----
... while talking to bae.kr.psi.net.:
>>> MAIL From:<wide@widesys.co.kr>
<<< 553 5.3.0 OpenSpamRelay blocked see: http://ordb.org/
501 5.6.0 Data format error

3.

The original message was received at Tue, 28 May 2002 18:04:38 +0900
from [xx.xxx.xxx.x]

   ----- The following addresses had permanent fatal errors -----
<i-fighter@internori.net>
    (reason: 501 5.5.4 Invalid Address)

   ----- Transcript of session follows -----
... while talking to mail.internori.net.:
>>> HELO wide.
<<< 501 5.5.4 Invalid Address
554 5.0.0 Service unavailable