为什么会出现Route slip host？！

毛儿

ABC.com是MD的一个次域，本来是次域内的两个用户发信，可是邮件却跑到远程队列中，出现了Route slip host: B.com，被发送到B.com去啦，人家还以为我们在发垃圾邮件呢

为啥会这样啊，是MD上设置有问题呢？还是客户端发送邮件时做了什么设置？

SMTP（OUT）日志：

03:39:48: Session 5952; child 4
03:39:26: Parsing Message <f:\mdaemon\queues\remote\retry\pd90000001188.msg>
03:39:26: From: chenying@ABC.com
03:39:26: To: tongjiwen@ABC.com
03:39:26: Subject:
03:39:26: Message-ID:
03:39:26: Route slip host: B.com
03:39:26: Route slip port: 25
03:39:26: MX-record resolution of [B.com] in progress (DNS Server: 202.96.209.5)...
03:39:26: *  P=010 D=B.com TTL=(54) MX=[mercury.B.com] {202.96.247.9}
03:39:26: *  P=005 D=B.com TTL=(54) MX=[smg3.B.com] {220.248.108.43}
03:39:26: *  P=005 D=B.com TTL=(54) MX=[smg2.B.com] {202.96.247.41}
03:39:26: *  P=005 D=BTTL=(54) MX=[smg.B.com] {220.248.108.42}
03:39:26: *  P=003 D=BTTL=(54) MX=[smgs.B.com] {202.96.247.47}
03:39:26: Attempting MX: P=003 D=B.com TTL=(54) MX=[smgs.B.com] {202.96.247.47}
03:39:26: Attempting SMTP connection to [202.96.247.47 : 25]
03:39:26: Waiting for socket connection...
03:39:26: Socket connection established (127.0.0.1 : 1413 -> 202.96.247.47 : 25)
03:39:26: Waiting for protocol initiation...
03:39:26: <-- 451 Audit system deny remote ip
03:39:26: --> QUIT

U-Mail

你的MD配置奇怪，你好像是设置了投递失败的转发，但是转发的服务器又拒绝为你转发。

毛儿

我检查了，并没做这个设置；“ Route slip host”在什么情况下会出现，我检查了日志，发现并不是所有的远程队列邮件都出现这个信息,这个就没有：

09:19:33: Session 1625; child 1
09:19:33: Parsing Message <f:\mdaemon\queues\remote\pd35000058217.msg>
09:19:33: From: wuyanhua@ABC.com
09:19:33: To: PHHRL@MAIL.ONLINE.SH.CN
09:19:33: Subject: =?gb2312?B?Rnc6INOmxrg6sta/4tb3udw=?=
09:19:33: Message-ID: <00d601c6a551$551e9740$bb748ba7@csvw.com>
09:19:33: MX-record resolution of [MAIL.ONLINE.SH.CN] in progress (DNS Server: 202.96.209.5)...
09:19:33: *  P=010 D=MAIL.ONLINE.SH.CN TTL=(1440) MX=[mail.online.sh.cn] {202.96.216.48}
09:19:33: Attempting MX: P=010 D=MAIL.ONLINE.SH.CN TTL=(1440) MX=[mail.online.sh.cn] {202.96.216.48}
09:19:33: Attempting SMTP connection to [202.96.216.48 : 25]
09:19:33: Waiting for socket connection...
09:19:33: Socket connection established (127.0.0.1 : 3766 -> 202.96.216.48 : 25)

所以想请教一下“ Route slip host”这个是怎么出现的

毛儿

再看下面这两个，发往同一个地址的，一个用了“Route slip host”，然后去找MX，而下面一个直接去找了MX:
08:13:15: Session 8855; child 1
08:12:43: Parsing Message <d:\netsoft\mdaemon\queues\remote\pd50000003861.msg>
08:12:43: From: Andrew@ABC.com
08:12:43: To: AAdamo@rohmhaas.com
08:12:43: Subject: Re: Amino-Chem
08:12:43: Message-ID: <WorldClient-F200602160812.AA12380055@amino-chem.cn>
  08:12:43: Route slip host: rohmhaas.com
08:12:43: Route slip port: 25
08:12:43: MX-record resolution of [rohmhaas.com] in progress (DNS Server: 202.96.209.5)...


08:13:32: Session 8861; child 1
08:13:19: Parsing Message <d:\netsoft\mdaemon\queues\remote\pd50000003862.msg>
08:13:19: From: Andrew@ABC.com
08:13:19: To: AAdamo@rohmhaas.com
08:13:19: Subject: Re: Amino-Chem
08:13:19: Message-ID: <WorldClient-F200602160813.AA13150056@amino-chem.cn>
08:13:19:  MX-record resolution of [rohmhaas.com] in progress (DNS Server: 202.96.209.5)...

毛儿

咋没人理呢，钉子大哥见多识广，快帮我看看啊！！

hjohn

同问同问！
我也遇到这个问题，明明是公司域内部用户互发邮件，但是日志里却冒出两行：
Route slip host: xxxx.com
Route slip port: 25
这个xxxx.com根本就跟我们公司这个域名没有任何关系啊。更崩溃的是，这个xxxx.com估计是用了barracuda的垃圾邮件防火墙，结果把我公司服务器的IP给屏蔽掉了！这样搞得自己内部互发邮件都发不成了，TNND，怎么回事啊？？