CNAME lookup failed temporarily 退信（1）

<!-- [if gte mso 9]><xml><w:WordDocument><w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel><w:DisplayHorizontalDrawingGridEvery>0</w:DisplayHorizontalDrawingGridEvery><w:DisplayVerticalDrawingGridEvery>2</w:DisplayVerticalDrawingGridEvery><w:DocumentKind>DocumentNotSpecified</w:DocumentKind><w:DrawingGridVerticalSpacing>7.8</w:DrawingGridVerticalSpacing><w:View>Normal</w:View><w:Compatibility></w:Compatibility><w:Zoom>0</w:Zoom></w:WordDocument></xml><![endif]-->

退信如下：

Hi.Thisistheqmail-sendprogramatmx28.dns.com.cn.
I'mafraidIwasn'tabletodeliveryourmessagetothefollowingaddresses.
Thisisapermanenterror;I'vegivenup.Sorryitdidn'tworkout.
<omer@sethi.com>:
CNAMElookupfailedtemporarily. (#4.4.3)
I'mnotgoingtotryagain;thismessagehasbeeninthequeuetoolong.
---Belowthislineisacopyofthemessage.

从退信里能看到是由于别名解析错误导致邮件无法发送

那先看一下收件域的MX解析，如下：

<!-- [if gte mso 9]><xml><w:WordDocument><w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel><w:DisplayHorizontalDrawingGridEvery>0</w:DisplayHorizontalDrawingGridEvery><w:DisplayVerticalDrawingGridEvery>2</w:DisplayVerticalDrawingGridEvery><w:DocumentKind>DocumentNotSpecified</w:DocumentKind><w:DrawingGridVerticalSpacing>7.8</w:DrawingGridVerticalSpacing><w:View>Normal</w:View><w:Compatibility></w:Compatibility><w:Zoom>0</w:Zoom></w:WordDocument></xml><![endif]-->

]#digmxsethi.com

;<<>>DiG9.6.1-P1<<>>mxsethi.com

;;globaloptions:+cmd

;;Gotanswer:

;;->>HEADER<<-opcode:QUERY,status:SERVFAIL,id:45625

;;flags:qrrdra;QUERY:1,ANSWER:0,AUTHORITY:0,ADDITIONAL:0

;;QUESTIONSECTION:

;sethi.com. IN MX

;;Querytime:1msec

;;SERVER:119.254.72.9#53(119.254.72.9)

;;WHEN:ThuMay2617:35:072011

;;MSGSIZErcvd:27

从上面的解析结果看到了，收件域根本就没有MX解析记录嘛

没有MX解析，你让发件方把邮件发到哪儿去啊