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▷ 제품버젼 : Nmail PHP 2.6.12  UTF-8

▷ 오류발생 메뉴/주소 : 메일 발송

▷ 에러메세지 :

-----Original Message-----
From: ubec.co.kr PostMaster [mailto:****@****]
Sent: Tuesday, March 15, 2016 5:12 PM
To: ****@****
Subject: Error sending message [1458026717610.5876.2bd66.eml] from [ubec.co.
kr]

[<00>] XMail bounce: Rcpt=[****@****];Error=[The maximum number
of delivery attempts has been reached]


[<01>] Error sending message [1458026717610.5876.2bd66.eml] from
[ubec.co.kr].

ID: <S2634BB>
Mail From: <****@****>
Rcpt To: <****@****>
Server: <ns2.daum.net> [180.70.93.98]


[<02>] The reason of the delivery failure was:

The maximum number of delivery attempts has been reached


[<04>] Here is listed the message log file:

[PeekTime] 1458025776 : Tue, 15 Mar 2016 16:09:36 +0900 <<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx1.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx1.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx3.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx3.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx4.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx4.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx2.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx2.hanmail.net."
>>
[PeekTime] 1458026524 : Tue, 15 Mar 2016 16:22:04 +0900 <<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx1.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx1.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx3.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx3.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx4.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx4.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx2.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx2.hanmail.net."
>>
[PeekTime] 1458027263 : Tue, 15 Mar 2016 16:34:23 +0900 <<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx1.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx1.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx4.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx4.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx3.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx3.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx2.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx2.hanmail.net."
>>
[PeekTime] 1458028017 : Tue, 15 Mar 2016 16:46:57 +0900 <<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx1.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx1.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx4.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx4.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx3.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx3.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx2.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx2.hanmail.net."
>>
[PeekTime] 1458028756 : Tue, 15 Mar 2016 16:59:16 +0900 <<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx4.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx4.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx2.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx2.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx3.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx3.hanmail.net."
>>
<<
ErrCode = -162
ErrString = End of socket stream data
SMAIL SMTP-Send MX = "mx1.hanmail.net." SMTP = "ubec.co.kr" From =
"****@****" To = "****@****" Failed !
SMTP-Error = "417 Temporary delivery error"
SMTP-Server = "mx1.hanmail.net."
>>


[<05>] Here is listed the initial part of the message:

X-AuthUser: ****@****
Received: from dghwang ([1.224.88.245]:62969)
by ubec.co.kr with [XMail 1.22 PassKorea120228 ESMTP Server]
id <S2634BB> for <****@****> from <****@****>;
Tue, 15 Mar 2016 16:09:35 +0900
From: =?ks_c_5601-1987?B?yLK067HZ?= <****@****>
To: =?ks_c_5601-1987?B?uejDtbz2?= <****@****>
Subject: =?ks_c_5601-
1987?B?W1VCRUNdIEFSUCAtIE5ERSC4rsb3xq4gudcgsMu757vnwfggvNs=?=
=?ks_c_5601-1987?B?us4=?=
Date: Tue, 15 Mar 2016 16:09:16 +0900
Message-ID: <001301d17e89$96178c40$c246a4c0$@co.kr>
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_NextPart_000_0014_01D17ED5.05FF3440"
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: AdF+iZYCUEt6R4KuT1mjT+bCIJezvQ==
Content-Language: ko

▷ 질문내용 : 모든 메일이 전송 불가한건 아닙니다. 잘 될때는 또 잘됩니다.

발송실패는 하루에 2~3회정도 발생하는듯 합니다.

그리고 에러발생시 받는쪽에서는 같은메일이 20번 정도 반복수신되는 현상이 있습니다.

이유가 무엇때문일까요?