야후로 발송이 안되요...

안녕하세요...

현재 자체 메일서버를 sendmail 8.12.8을 쓰고 있습니다.

SMTP AUTH 기능을 이용해서 메일을 발송하고 있는데요....

다른 곳으로는 잘 나가지는데 유독 야후쪽만 리턴메일일이 아래와 같이 날아옵니다.

The original message was received at Tue, 1 Nov 2005 11:53:29 +0900 from [221.151.137.20]

   ----- The following addresses had permanent fatal errors ----- <hskim@yahoo.co.kr>
    (reason: 553 Mail from 210.122.102.152 not allowed - VS99-IP1 deferred - see help.yahoo.com/help/us/mail/defer/defer-02.html (#5.7.1) [10])

   ----- Transcript of session follows ----- ... while talking to mx3a.mail.yahoo.co.kr.:
<<< 553 Mail from 210.122.102.152not allowed - VS99-IP1 deferred - see help.yahoo.com/help/us/mail/defer/defer-02.html (#5.7.1) [10] ... while talking to mx3b.mail.yahoo.co.kr.:
>>> QUIT
<<< 553 Mail from 210.122.102.152not allowed - VS99-IP1 deferred - see help.yahoo.com/help/us/mail/defer/defer-02.html (#5.7.1) [10]
554 5.0.0 Service unavailable

어떻게 조치를 해야할지 모르겠네용....

많은 조엄 부탁드립니다.