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Wrong with 'Recipient address rejected: Domain not found'

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  • Feel Zhou
    Hello, my friend This is tom, I sending my greeting from China There is some problem, need your help I check the log file Apr 25 10:02:24 shcx
    Message 1 of 2 , Apr 25, 2013
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      Hello, my friend
      This is tom, I sending my greeting from China
      There is some problem, need your help
      I check the log file

      Apr 25 10:02:24 shcx postfix/smtpd[21741]: NOQUEUE: reject: RCPT from mail.example.com[d.d.d.d]: 450 4.1.2 <someone@...>: Recipient address rejected: Domain not found; from=<someone@...> to=<somebody@...> proto=ESMTP helo=<mail.example.com>

      dig sino-progress.com mx
      sino-progress.com.      40      IN      MX      10 qiye163mx01.mxmail.netease.com.
      sino-progress.com.      40      IN      MX      50 qiye163mx02.mxmail.netease.com.

      This domain already exist, why noqueue

      TOM

    • Viktor Dukhovni
      ... Always with a new thread: http://www.postfix.org/DEBUG_README.html#mail Best guess given scant information:
      Message 2 of 2 , Apr 25, 2013
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        On Fri, Apr 26, 2013 at 01:39:19PM +0800, Feel Zhou wrote:

        > Apr 25 10:02:24 shcx postfix/smtpd[21741]: NOQUEUE: reject: RCPT from
        > mail.example.com[d.d.d.d]: 450 4.1.2 <someone@...>: Recipient
        > address rejected: Domain not found; from=<someone@...> to=<
        > somebody@...> proto=ESMTP helo=<mail.example.com>
        >
        > dig sino-progress.com mx
        > sino-progress.com. 40 IN MX 10
        > qiye163mx01.mxmail.netease.com.
        > sino-progress.com. 40 IN MX 50
        > qiye163mx02.mxmail.netease.com.

        > This domain already exist, why noqueue

        Always with a new thread:

        http://www.postfix.org/DEBUG_README.html#mail

        Best guess given scant information:

        http://www.postfix.org/postconf.5.html#reject_unknown_recipient_domain

        ... The response is always 450 in case of a temporary DNS error. ...

        Best practice for most sites:

        Don't use reject_unknown_recipient_domain.

        Note for this restriction to pass not only do the MX records have to
        resolve, but the MX hosts have to resolve to network addresses. Any
        of this can tempfail.

        --
        Viktor.
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