--- Session Transcript ---
Thu 2008-02-21 01:05:03: Parsing message <xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\pd90000000175.msg>
Thu 2008-02-21 01:05:03: *  From: guanchong@jinghope.com
Thu 2008-02-21 01:05:03: *  To: jp@heitz-parsons-sadek.com
Thu 2008-02-21 01:05:03: *  Subject: Hyatt SuZhou hotel  1-3
Thu 2008-02-21 01:05:03: *  Message-ID: <001901c87306$7627b190$8700a8c0@guanchong>
Thu 2008-02-21 01:05:03: *  Route slip host: heitz-parsons-sadek.com
Thu 2008-02-21 01:05:03: *  Route slip port: 25
Thu 2008-02-21 01:05:03: 试图 SMTP 连接到 [heitz-parsons-sadek.com]
Thu 2008-02-21 01:05:03: 正在解析 [heitz-parsons-sadek.com] MX 记录 (DNS 服务器：61.177.7.1)...
Thu 2008-02-21 01:05:03: *  P=010 S=001 D=heitz-parsons-sadek.com TTL=(10) MX=[email.heitz-parsons-sadek.com]
Thu 2008-02-21 01:05:03: *  P=020 S=002 D=heitz-parsons-sadek.com TTL=(10) MX=[mx1.biz.mail.yahoo.com] {67.28.113.136}
Thu 2008-02-21 01:05:03: *  P=020 S=003 D=heitz-parsons-sadek.com TTL=(10) MX=[mx1.biz.mail.yahoo.com] {209.191.89.172} multi-homed
Thu 2008-02-21 01:05:03: *  P=020 S=004 D=heitz-parsons-sadek.com TTL=(10) MX=[mx1.biz.mail.yahoo.com] {4.79.181.18} multi-homed
Thu 2008-02-21 01:05:03: *  P=030 S=000 D=heitz-parsons-sadek.com TTL=(10) MX=[mx5.biz.mail.yahoo.com] {68.142.224.244}
Thu 2008-02-21 01:05:03: *  P=030 S=005 D=heitz-parsons-sadek.com TTL=(10) MX=[mx5.biz.mail.yahoo.com] {66.196.126.37} multi-homed
Thu 2008-02-21 01:05:03: 试图 SMTP 连接到 [email.heitz-parsons-sadek.com:25]
Thu 2008-02-21 01:05:03: 正在解析 [email.heitz-parsons-sadek.com] A 记录 (DNS 服务器：61.177.7.1)...
Thu 2008-02-21 01:05:04: *  D=email.heitz-parsons-sadek.com TTL=(10) A=[70.148.163.86]
Thu 2008-02-21 01:05:04: 试图 SMTP 连接到 [70.148.163.86:25]
Thu 2008-02-21 01:05:04: 正在等待套接字连接...
Thu 2008-02-21 01:05:25: *  Winsock Error 10060 连接超时。
Thu 2008-02-21 01:05:25: *  70.148.163.86 added to connection failure cache for 5 minutes
Thu 2008-02-21 01:05:25: 试图 SMTP 连接到 [67.28.113.136:25]
Thu 2008-02-21 01:05:25: 正在等待套接字连接...
Thu 2008-02-21 01:05:25: *  连接已建立（221.224.90.131:36886 -> 67.28.113.136:25）
Thu 2008-02-21 01:05:25: 正在等待协议启动...
Thu 2008-02-21 01:05:26: <-- 421 Message from (221.224.90.131) temporarily deferred - 4.16.50. Please refer to http://help.yahoo.com/help/us/mail/defer/defer-06.html
Thu 2008-02-21 01:05:26: --> QUIT
Thu 2008-02-21 01:05:26: 试图 SMTP 连接到 [209.191.89.172:25]
Thu 2008-02-21 01:05:26: 正在等待套接字连接...
Thu 2008-02-21 01:05:26: *  连接已建立（221.224.90.131:36888 -> 209.191.89.172:25）
Thu 2008-02-21 01:05:26: 正在等待协议启动...
Thu 2008-02-21 01:05:26: <-- 220 mta118.biz.mail.mud.yahoo.com ESMTP YSmtp service ready
Thu 2008-02-21 01:05:26: --> EHLO mail.jinghope.com
Thu 2008-02-21 01:05:26: <-- 250-mta118.biz.mail.mud.yahoo.com
Thu 2008-02-21 01:05:26: <-- 250-8BITMIME
Thu 2008-02-21 01:05:26: <-- 250-SIZE 31981568
Thu 2008-02-21 01:05:26: <-- 250 PIPELINING
Thu 2008-02-21 01:05:26: --> MAIL From:<prvs=19351a88f6=guanchong@jinghope.com> SIZE=7311806
Thu 2008-02-21 01:05:27: <-- 250 sender <prvs=19351a88f6=guanchong@jinghope.com> ok
Thu 2008-02-21 01:05:27: --> RCPT To:<design@heitz-parsons-sadek.com>
Thu 2008-02-21 01:05:27: <-- 250 recipient <design@heitz-parsons-sadek.com> ok
Thu 2008-02-21 01:05:27: --> RCPT To:<jp@heitz-parsons-sadek.com>
Thu 2008-02-21 01:05:27: <-- 250 recipient <jp@heitz-parsons-sadek.com> ok
Thu 2008-02-21 01:05:27: --> DATA
Thu 2008-02-21 01:05:27: <-- 354 go ahead
Thu 2008-02-21 01:05:27: 正在发送 <d:\mdaemon\queues\remote\retry\pd90000000175.msg> 到 [209.191.89.172]
Thu 2008-02-21 02:14:50: Socket connection closed by the other side (how rude!)
Thu 2008-02-21 02:14:50: 试图 SMTP 连接到 [4.79.181.18:25]
Thu 2008-02-21 02:14:50: 正在等待套接字连接...
Thu 2008-02-21 02:14:50: *  连接已建立（221.224.90.131:37096 -> 4.79.181.18:25）
Thu 2008-02-21 02:14:50: 正在等待协议启动...
Thu 2008-02-21 02:14:51: *  Winsock Error 10054 连接被另一端重置！
Thu 2008-02-21 02:14:51: 写入套接字错误
Thu 2008-02-21 02:14:51: 此邮件已经过了 1 天；还剩 0 天可投递
Thu 2008-02-21 02:14:51: 当投递尝试失败时将通知 guanchong@jinghope.com
--- End Transcript ---

这个是对方的灰名单机制起作用，原理为故意发送个失败信息，导致邮服重试，第二次时就放行了，通常群发器没有重试机制，就是基于此设计的。不过最好还是让对方加你为白名单较好。