Re: [exim] MX name with _ : all relevant MX records point t…

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Lähettäjä: Mike Cardwell
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Aihe: Re: [exim] MX name with _ : all relevant MX records point tonon-existent hosts
Ian Eiloart wrote:

>> Some clever admin configured the MX of a domain pointing to
>> server_01.domain.com.
>
> You can tell him from me that he won't be getting email from the University
> of Sussex. And, that most people probably don't care that they can't
> deliver email to him. How would he know, therefore, that he had a problem?


Here's another 45 UK Universites using Exim, the vast majority of which
wont be able to email him:

      1  abdn.ac.uk         - 220 mailhub2.abdn.ac.uk ESMTP Exim 4.52 
Thu, 23 Apr 2009 13:28:21 +0100
      2  abertay.ac.uk      - 220 uadspa03.uad.ac.uk ESMTP Exim 4.69 
Thu, 23 Apr 2009 13:28:29 +0100
      3  bham.ac.uk         - 220 bham-mx3.bham.ac.uk ESMTP Exim 4.67 
Thu, 23 Apr 2009 13:28:23 +0100
      4  bris.ac.uk         - 220 dirf.bris.ac.uk ESMTP Exim 4.67 Thu, 
23 Apr 2009 13:28:22 +0100
      5  bton.ac.uk         - 220 carpo.brighton.ac.uk ESMTP Exim 4.63 
Thu, 23 Apr 2009 13:28:21 +0100
      6  cam.ac.uk          - 220-ppsw-1.csi.cam.ac.uk (mx.cam.ac.uk 
[131.111.8.141]:25) ESMTP Exim 4.70+ppsw+0 Thu, 23 Apr 2009 13:28:21 +0100
      7  cant.ac.uk         - 220 mailgw01.canterbury.ac.uk ESMTP Exim 
4.63 Thu, 23 Apr 2009 13:28:19 +0100
      8  cf.ac.uk           - 220 hedwig2.cf.ac.uk ESMTP Exim 4.69 Thu, 
23 Apr 2009 13:28:21 +0100
      9  cranfield.ac.uk    - 220 mailgate-7.central.cranfield.ac.uk 
ESMTP Exim 4.69 Thu, 23 Apr 2009 13:28:22 +0100
     10  dundee.ac.uk       - 220 pp8.dundee.ac.uk ESMTP Exim 4.43 Thu, 
23 Apr 2009 13:29:49 +0100
     11  essex.ac.uk        - 220 serlx29.essex.ac.uk ESMTP Exim 4.69 
Thu, 23 Apr 2009 13:28:27 +0100
     12  ex.ac.uk           - 220 mercury.ex.ac.uk ESMTP Exim 4.68 Thu, 
23 Apr 2009 13:28:23 +0100
     13  gla.ac.uk          - 220 palin.cent.gla.ac.uk ESMTP Exim 4.22 
Thu, 23 Apr 2009 13:28:31 +0100
     14  glam.ac.uk         - 220 mta1.glam.ac.uk ESMTP Exim 4.63 Thu, 
23 Apr 2009 13:28:22 +0100
     15  harper-adams.ac.uk - 220 xenial.mcc.ac.uk ESMTP Exim 4.69 Thu, 
23 Apr 2009 13:28:21 +0100
     16  hud.ac.uk          - 220 cnoc.hud.ac.uk ESMTP Exim 4.68 Thu, 23 
Apr 2009 13:28:20 +0100
     17  hw.ac.uk           - 220 mail-r.hw.ac.uk ESMTP Exim 4.54 Thu, 
23 Apr 2009 13:28:21 +0100
     18  ic.ac.uk           - 220 mx4.cc.ic.ac.uk ESMTP Exim 4.67 Thu, 
23 Apr 2009 13:28:21 +0100
     19  kent.ac.uk         - 220 mx4.kent.ac.uk ESMTP Exim 4.63 Thu, 23 
Apr 2009 13:28:21 +0100
     20  lancs.ac.uk        - 220 ignavia.lancs.ac.uk ESMTP Exim 4.69 
Thu, 23 Apr 2009 13:28:25 +0100 (PBTX)
     21  lboro.ac.uk        - 220-boo.lut.ac.uk ESMTP Exim 4.66 #1 Thu, 
23 Apr 2009 13:28:34 +0100
     22  le.ac.uk           - 220 gemsbok.le.ac.uk (mailin.le.ac.uk 
[143.210.16.42]:25) ESMTP Exim 4.63 Thu, 23 Apr 2009 13:28:34 +0100
     23  lincoln.ac.uk      - 220 kaitain.lincoln.ac.uk ESMTP Exim 4.69 
Thu, 23 Apr 2009 13:28:46 +0100
     24  liv.ac.uk          - 220 mxd.liv.ac.uk ESMTP Exim 4.67 Thu, 23 
Apr 2009 13:28:15 +0100
     25  lmu.ac.uk          - 220 mrelay-f-ext.lmu.ac.uk ESMTP Exim 4.60 
Thu, 23 Apr 2009 13:28:25 +0100
     26  londonmet.ac.uk    - 220 buzzard.londonmet.ac.uk ESMTP Exim 
4.69 Thu, 23 Apr 2009 13:28:23 +0100
     27  man.ac.uk          - 220 deimos.mcc.ac.uk ESMTP Exim 4.69 Thu, 
23 Apr 2009 13:28:22 +0100
     28  nott.ac.uk         - 220 mx1.nottingham.ac.uk ESMTP Exim 4.60 
Thu, 23 Apr 2009 13:28:21 +0100
     29  open.ac.uk         - 220 neptune.open.ac.uk ESMTP Exim 4.69 
Thu, 23 Apr 2009 13:28:19 +0100
     30  ox.ac.uk           - 220 relay1.mail.ox.ac.uk ESMTP Exim 4.69 
Thu, 23 Apr 2009 13:28:21 +0100
     31  plym.ac.uk         - 220-tracy.csd.plymouth.ac.uk ESMTP Exim 
4.69 Thu, 23 Apr 2009 13:28:23 +0100
     32  qmw.ac.uk          - 220 mail2.qmul.ac.uk ESMTP Exim 4.66 Thu, 
23 Apr 2009 13:28:21 +0100
     33  qub.ac.uk          - 220 mailhub2.qub.ac.uk ESMTP Exim 4.69 
Thu, 23 Apr 2009 12:28:21 +0000
     34  rdg.ac.uk          - 220 vimp4.rdg.ac.uk ESMTP Exim Thu, 23 Apr 
2009 13:28:21 +0100
     35  soas.ac.uk         - 220 mr3.soas.ac.uk ESMTP Exim 4.60 Thu, 23 
Apr 2009 13:28:21 +0100 Welcome to the School of Oriental and African 
Studies Mail server Please put your spam back in the can
     36  staffs.ac.uk       - 220 crusms1a.staffs.ac.uk ESMTP Exim 4.66 
Thu, 23 Apr 2009 13:28:21 +0100
     37  stir.ac.uk         - 220 mailrelay2.stir.ac.uk ESMTP Exim 4.63 
Thu, 23 Apr 2009 13:28:21 +0100
     38  strath.ac.uk       - 220 mx3.strath.ac.uk ESMTP Exim Thu, 23 
Apr 2009 12:28:47 +0000
     39  susx.ac.uk         - 220 karpinski.uscs.susx.ac.uk ESMTP Exim 
4.64 Thu, 23 Apr 2009 13:29:05 +0100
     40  swan.ac.uk         - 220 harpo.swan.ac.uk ESMTP Exim 4.69 Thu, 
23 Apr 2009 13:28:24 +0100
     41  ucl.ac.uk          - 220 vscan-a.ucl.ac.uk ESMTP Exim 4.60 Thu, 
23 Apr 2009 13:28:45 +0100
     42  uclan.ac.uk        - 220 mail2.uclan.ac.uk ESMTP Exim 4.69 Thu, 
23 Apr 2009 13:28:21 +0100
     43  umist.ac.uk        - 220 deimos.mcc.ac.uk ESMTP Exim 4.69 Thu, 
23 Apr 2009 13:28:22 +0100
     44  uwic.ac.uk         - 220 llex02.uwic.ac.uk ESMTP Exim 4.43 Thu, 
23 Apr 2009 13:29:31 +0100
     45  wmin.ac.uk         - 220 isls-mx30.wmin.ac.uk ESMTP Exim 4.69 
Thu, 23 Apr 2009 13:28:21 +0100


I wonder how many hundreds of thousands of staff and students that covers.

--
Mike Cardwell
(https://secure.grepular.com/) (http://perlcv.com/)