다른 도메인에서 보낸 메일인데 메일이 반송되었는데요 로그에도 안남았네요

아래 오류메세지입니다

어떤 이유일까요

※ 필수입력정보 ※

▷ 제품버젼 : Nmail 3.8

▷ 오류발생 메뉴/주소 :

▷ 에러메세지 :

▷ 질문내용 :

-----------------------------------------------------------
This message was undeliverable.
Check sending error log.
-----------------------------------------------------------

From : ****@****
To   : ****@****
---------------------Log Contents--------------------------

14:56:39 danulogis.com  E:\MailRoot\PickUp\R1#***-****-****9#****@****#3309.em ---- 14:56:40 danulogis.com Remote Server:61.100.5.214 Connecting to server. 61.100.5.214 Port: 25 2011-06-23 오후 2:56:40 Connect sync.
Connection made.
Connected to : 61.100.5.214. Getting welcome message.2011-06-23 오후 2:56:41 220 *******************************************
EHLO bhands.com
250-webdive.co.kr
250-VRFY
250 AUTH LOGIN PLAIN
MAIL FROM:<****@****>
250 OK
RCPT TO:<****@****>
250 OK
DATA
354 Start mail input: end with <CRLF>.<CRLF> Error sending data to socket. System.Net.Sockets.SocketException: 현재 연결은 원격 호스트에 의해 강제로 끊겼습니다
   at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 size, SocketFlags socketFlags)
   at Quiksoft.EasyMail.Internal.?.?(Byte[] A_0, Int32 A_1)Closing socket.
Socket closed.
14:58:58 danulogis.com GOTO SMTP 1----
14:58:58 danulogis.com 61.100.5.214 CONNECT!
14:58:58 danulogis.com 61.100.5.214 CONNECT, 220 *******************************************
14:58:59 danulogis.com 61.100.5.214 HELO bhands.com, 250 webdive.co.kr
14:58:59 danulogis.com 61.100.5.214 MAIL FROM:<****@****>, 250 OK 14:59:00 danulogis.com 61.100.5.214 RCPT TO:<****@****>, 250 OK 14:59:00 danulogis.com 61.100.5.214 DATA, 354 Start mail input: end with <CRLF>.<CRLF> 14:59:00 danulogis.com 61.100.5.214 SIZE, 40984
15:01:01 danulogis.com 61.100.5.214 ERR-Data Sending
15:01:01 danulogis.com 61.100.5.214 354 Start mail input: end with <CRLF>.<CRLF> 15:02:40 danulogis.com  E:\MailRoot\PickUp\R2#***-****-****0#****@****#3351.em ---- 15:02:40 danulogis.com Remote Server:61.100.5.214 Connecting to server. 61.100.5.214 Port: 25 2011-06-23 오후 3:02:40 Connect sync.
Connection made.
Connected to : 61.100.5.214. Getting welcome message.2011-06-23 오후 3:02:40 220 *******************************************
EHLO bhands.com
250-webdive.co.kr
250-VRFY
250 AUTH LOGIN PLAIN
MAIL FROM:<****@****>
250 OK
RCPT TO:<****@****>
250 OK
DATA
354 Start mail input: end with <CRLF>.<CRLF> Error sending data to socket. System.Net.Sockets.SocketException: 현재 연결은 원격 호스트에 의해 강제로 끊겼습니다
   at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 size, SocketFlags socketFlags)
   at Quiksoft.EasyMail.Internal.?.?(Byte[] A_0, Int32 A_1)Closing socket.
Socket closed.
15:04:43 danulogis.com GOTO SMTP 1----
15:04:43 danulogis.com 61.100.5.214 CONNECT!
15:04:43 danulogis.com 61.100.5.214 CONNECT, 220 *******************************************
15:04:43 danulogis.com 61.100.5.214 HELO bhands.com, 250 webdive.co.kr
15:04:44 danulogis.com 61.100.5.214 MAIL FROM:<****@****>, 250 OK
15:04:45 danulogis.com 61.100.5.214 RCPT TO:<****@****>, 250 OK
15:04:45 danulogis.com 61.100.5.214 DATA, 354 Start mail input: end with <CRLF>.<CRLF>
15:04:45 danulogis.com 61.100.5.214 SIZE, 40984
15:06:38 danulogis.com 61.100.5.214 ERR-Data Sending
15:06:38 danulogis.com 61.100.5.214 354 Start mail input: end with <CRLF>.<CRLF> 15:08:40 danulogis.com  E:\MailRoot\PickUp\R3#***-****-****0#****@****#3365.em ---- 15:08:40 danulogis.com Remote Server:61.100.5.214 Connecting to server. 61.100.5.214 Port: 25 2011-06-23 오후 3:08:40 Connect sync.
Connection made.
Connected to : 61.100.5.214. Getting welcome message.2011-06-23 오후 3:08:40 220 *******************************************
EHLO bhands.com
250-webdive.co.kr
250-VRFY
250 AUTH LOGIN PLAIN
MAIL FROM:<****@****>
250 OK
RCPT TO:<****@****>
250 OK
DATA
354 Start mail input: end with <CRLF>.<CRLF> Error sending data to socket. System.Net.Sockets.SocketException: 현재 연결은 원격 호스트에 의해 강제로 끊겼습니다
   at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 size, SocketFlags socketFlags)
   at Quiksoft.EasyMail.Internal.?.?(Byte[] A_0, Int32 A_1)Closing socket.
Socket closed.
15:10:13 danulogis.com GOTO SMTP 1----
15:10:13 danulogis.com 61.100.5.214 CONNECT!
15:10:13 danulogis.com 61.100.5.214 CONNECT, 220 *******************************************
15:10:13 danulogis.com 61.100.5.214 HELO bhands.com, 250 webdive.co.kr
15:10:13 danulogis.com 61.100.5.214 MAIL FROM:<****@****>, 250 OK
15:10:14 danulogis.com 61.100.5.214 RCPT TO:<****@****>, 250 OK
15:10:14 danulogis.com 61.100.5.214 DATA, 354 Start mail input: end with <CRLF>.<CRLF>
15:10:14 danulogis.com 61.100.5.214 SIZE, 40984
15:11:46 danulogis.com 61.100.5.214 ERR-Data Sending
15:11:46 danulogis.com 61.100.5.214 354 Start mail input: end with <CRLF>.<CRLF>