寄給某個人會出現伺服器忙碌的退信

jerrytien

我寄信給某人會出現忙碌的退信，到SMTP LOG(OUT)查看，也是顯示一樣的訊息
這是對方的問題還是我方造成

Thu 2009-01-22 09:55:09: ----------
Thu 2009-01-22 09:55:49: Session 7202; child 1
Thu 2009-01-22 09:55:19: Parsing Message <d:\mdaemon\remoteq\pd50002231986.msg>
Thu 2009-01-22 09:55:19: From: [email protected]
Thu 2009-01-22 09:55:19: To: [email protected]
Thu 2009-01-22 09:55:19: Subject: Frt  req-  toys- taichunng - kuwait in FEB, 2009
Thu 2009-01-22 09:55:19: Message-ID:
Thu 2009-01-22 09:55:19: MX-record resolution of [caesarscargo.com] in progress (DNS Server: 168.95.1.1)...
Thu 2009-01-22 09:55:48: 30 second wait for DNS response exceeded (attempt 1 of 3).
Thu 2009-01-22 09:55:48: MX-record resolution of [caesarscargo.com] in progress (DNS Server: 211.72.170.218)...
Thu 2009-01-22 09:55:49: P=021 D=caesarscargo.com TTL=(1440) MX=[mx2.caesarscargo.com] {72.167.41.13}
Thu 2009-01-22 09:55:49: P=011 D=caesarscargo.com TTL=(1440) MX=[mx1.caesarscargo.com] {72.167.41.128}
Thu 2009-01-22 09:55:49: Attempting MX: P=011 D=caesarscargo.com TTL=(1440) MX=[mx1.caesarscargo.com] {72.167.41.128}
Thu 2009-01-22 09:55:49: Attempting SMTP connection to [72.167.41.128 : 25]
Thu 2009-01-22 09:55:49: Waiting for socket connection...
Thu 2009-01-22 09:55:49: Socket connection established (211.72.170.221 : 1473 -> 72.167.41.128 : 25)
Thu 2009-01-22 09:55:49: Waiting for protocol initiation...
Thu 2009-01-22 09:55:49: <-- 451 ESMTP MailEnable Service temporarily refused connection at 01/21/09 18:49:56 from IP (127.0.0.1) because the server is too busy.
Thu 2009-01-22 09:55:49: --> QUIT
Thu 2009-01-22 09:55:49: Attempting MX: P=021 D=caesarscargo.com TTL=(1440) MX=[mx2.caesarscargo.com] {72.167.41.13}
Thu 2009-01-22 09:55:49: Attempting SMTP connection to [72.167.41.13 : 25]
Thu 2009-01-22 09:55:49: Waiting for socket connection...
Thu 2009-01-22 09:55:49: Socket connection established (211.72.170.221 : 1474 -> 72.167.41.13 : 25)
Thu 2009-01-22 09:55:49: Waiting for protocol initiation...
Thu 2009-01-22 09:55:49: <-- 451 ESMTP MailEnable Service temporarily refused connection at 01/21/09 18:49:57 from IP (127.0.0.1) because the server is too busy.
Thu 2009-01-22 09:55:49: --> QUIT
Thu 2009-01-22 09:55:49: This message is 0 minutes old; it has 60 minutes left in this queue
Thu 2009-01-22 09:55:49: SMTP session terminated (Bytes in/out: 268/12)
Thu 2009-01-22 09:55:49: ----------

MarchFun

我猜有可能是對方也使用了與 Greylisting 相似的功能。