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287437Re: badly broken mx record for bond.com

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  • Jim Reid
    Aug 2 3:04 AM
      On 2 Aug 2012, at 10:44, Varadi Gabor wrote:

      > The log also shows that the "warning: numeric domain name in
      > resource data of MX record for bond.com: 0.0.0.0"

      Yes, I saw that. This should have resulted in a hard error, not a
      warning.

      > I want solutions not only in this case in particular, but all
      > similar cases.

      IMO, the solution is to make sure postfix does The Right Thing and
      refuse to treat broken MX records that look like dotted decimals as IP
      addresses. Or at the very least make this behaviour configurable and
      have a sensible default. Weitse?

      If you're getting loops, perhaps you should install a current version
      of postfix? You said you had 2.7.something. Here's what happened with
      on a version 2.9.2 server when I just tried to email bond.com:


      Aug 2 10:57:20 hutch postfix/smtp[20772]: warning: numeric domain
      name in resource data of MX record for bond.com: 0.0.0.0
      Aug 2 10:57:20 hutch postfix/smtpd[20768]: connect from
      localhost[127.0.0.1]
      Aug 2 10:57:20 hutch postfix/smtp[20772]: warning: host
      0.0.0.0[0.0.0.0]:25 greeted me with my own hostname hutch.rfc1035.com
      Aug 2 10:57:20 hutch postfix/smtp[20772]: warning: host
      0.0.0.0[0.0.0.0]:25 replied to HELO/EHLO with my own hostname
      hutch.rfc1035.com
      Aug 2 10:57:20 hutch postfix/smtp[20772]: CA6391542837: to=<test@...
      >, relay=0.0.0.0[0.0.0.0]:25, delay=0.57, delays=0.24/0.01/0.32/0,
      dsn=5.4.6, status=bounced (mail for bond.com loops back to myself)
      Aug 2 10:57:20 hutch postfix/smtpd[20768]: disconnect from
      localhost[127.0.0.1]
      Aug 2 10:57:20 hutch postfix/cleanup[20771]: A4568154283E: message-
      id=<20120802095720.A4568154283E@...>
      Aug 2 10:57:20 hutch postfix/qmgr[32110]: A4568154283E: from=<>,
      size=2175, nrcpt=1 (queue active)
      Aug 2 10:57:20 hutch postfix/bounce[20773]: CA6391542837: sender non-
      delivery notification: A4568154283E
      Aug 2 10:57:20 hutch postfix/qmgr[32110]: CA6391542837: removed
      Aug 2 10:57:21 hutch postfix/smtp[20772]: A4568154283E: to=<jim@...
      >, relay=mailhost.rfc1035.com[93.186.33.42]:25, delay=0.51,
      delays=0.11/0/0.35/0.05, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued
      as 24269CBC41C)
      Aug 2 10:57:21 hutch postfix/qmgr[32110]: A4568154283E: removed
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