发国外邮件总是超时而断线，是为什么？？

your615

我公司用铁通的光纤专线，发国外邮件总是超时而断线，前几天换了个IP可正常用了十几天，现在又开始老时连上后传输了几K后就不动了，我现在一般是传了8K就停了，到最后退信提示都是连接超时断开。有时小邮件又能正常发到对方邮箱。应该不是IP被对方屏蔽，这到底是什么原因？？？

各位有没碰到这种事情，铁通查了也找不到原因，会不会是铁通出口带宽的问题呢？昨天铁通给了几个IP测试，发现有一个IP不是从广东出口的，发送速度很快，也其他几个（包括我现在用的IP）都是从广东出去的，速度都很慢，要不就传不了。

--- Session Transcript ---
> >  Parsing Message <c:\MDAEMON\Remoteq\pd10000008009.msg>
> >  From: success@darson.com
> >  To: Earlene.Henry@successappl.com
> >  Subject: Re: Z06/178(Re: P.O prices)
> >  Message-ID: <006601c6d157$79018320$1f00a8c0@darson.local>
> >  Route slip host: successappl.com
> >  Route slip port: 25
> >  MX-record resolution of [successappl.com] in progress (DNS Server:
> 222.47.62.22)...
> >  P=060 D=successappl.com TTL=(62) MX=[mail.intellispace.net]
> >  P=010 D=successappl.com TTL=(62) MX=[s3gm73a2.successappl.com]
> {66.9.21.6}
> >  Attempting MX: P=010 D=successappl.com TTL=(62)
> MX=[s3gm73a2.successappl.com] {66.9.21.6}
> >  Attempting SMTP connection to [66.9.21.6 : 25]
> >  Waiting for socket connection...
> >  Socket connection established (61.234.212.50 : 1787 -> 66.9.21.6 :
> 25)
> >  Waiting for protocol initiation...
> >  <-- 220 s3gm73a2.successappl.com SMTP; Tue, 05 Sep 2006 22:41:23
> -0400
> >  --> EHLO leedarson.com
> >  <-- 250 s3gm73a2.successappl.com Hello
> >  --> MAIL From:<success@darson.com>
> >  <-- 250 <success@darson.com>... Sender ok
> >  --> RCPT To:<Earlene.Henry@successappl.com>
> >  <-- 250 <Earlene.Henry@successappl.com>... Recipient ok
> >  --> RCPT To:<Eva_Peguero/success@successappl.com>
> >  <-- 250 <Eva_Peguero/success@successappl.com>... Recipient ok
> >  --> RCPT To:<Marc_Setton/success@successappl.com>
> >  <-- 250 <Marc_Setton/success@successappl.com>... Recipient ok
> >  --> DATA
> >  <-- 354 Enter mail, end with "." on a line by itself
> >  Sending <E:\ALTN\MDAEMON\Remoteq\pd10000008009.msg> to [66.9.21.6]
> >  Connection timed out!
> >  This message is 65 minutes old; it has 0 minutes left in this queue
> >  Primary queue lifetime exceeded; message placed in retry queue
> > --- End Transcript ---
> > : Message contains [1] file attachments

hir818

好像是 MDaemon 的老問題..
經常出現醬子的. ><"