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Thread: SSL verify error during R-verify and domain not resolve?

  1. #1
    Join Date
    Jul 2008
    Location
    Maastricht
    Posts
    3,464

    SSL verify error during R-verify and domain not resolve?

    I'm was using an online system to check various email authentications.

    It's possible to send a mail to: tester@email-test.had.dnsops.gov
    Then testmails should be created automatically, but I get every couple of days an email stating:
    host email-test.had.dnsops.gov [129.6.100.206]
    SMTP error from remote mail server after pipelined MAIL FROM:<mycompany@domain.nl> SIZE=1806:
    451 4.1.8 Domain of sender address mycompany@domain.nl does not resolve:
    retry timeout exceeded
    Which is odd, because I'm using this domain already for years.

    I just checked exim mainlog from juli 31st and see this, which I wonder if that has anything to do with it.
    Code:
    2018-07-31 02:52:39 1fkItz-0007Ir-Gn <= mycompany@domain.nl H=541xxxxxx.cm-5-7b.dynamic.ziggo.nl (PC12) [84.30.xxx.xxx] P=esmtpsa X=
    TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no A=login:mycompany@domain.nl S=757 id=000001d42868$c95ad4f0$5c107ed0$@mycompany.nl T="t
    est" from <mycompany@domain.nl> for tester@email-test.had.dnsops.gov
    2018-07-31 02:52:39 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1fkItz-0007Ir-Gn
    2018-07-31 02:52:40 1fkItz-0007Ir-Gn [129.6.100.206] SSL verify error: depth=0 error=self signed certificate cert=/C=US/ST=MD/L=Gait
    hersburg/O=NIST/OU=HAD-pilot/CN=email-test.had.dnsops.gov/emailAddress=scott.rose@nist.gov
    2018-07-31 02:52:40 1fkItz-0007Ir-Gn H=email-test.had.dnsops.gov [129.6.100.206]: SMTP error from remote mail server after pipelined
     MAIL FROM:<mycompany@domain.nl> SIZE=1806: 451 4.1.8 Domain of sender address mycompany@domain.nl does not resolve
    On the first line you can see that H=xxxx is my personal home address with the ip of my isp. So I can understand why this would generate an SSL error.

    However, to send mail somewhere I connect to the smtp of my server. Shouldn't the H= on the dnsops.gov server not be from my company's domain then?

    But it seems the real problem is that the domain of sender address does not resolve. And that is strange because I already use this domain already for 10 years.
    A check on ultratools shows that there is no problem at all resolving with the root servers.
    So is this a dnsops.gov issue? Or is still something wrong on my side?
    Greetings, Richard.

  2. #2
    Join Date
    May 2014
    Location
    Netherlands Germany
    Posts
    347
    Same here i tested for you only
    This message was created automatically by mail delivery software.
    A message that you sent has not yet been delivered to one or more of its
    recipients after more than 24 hours on the queue on vp......

    The message identifier is: 1fmDfc-0003fI-OT
    The subject of the message is: Even testen van mail
    The date of the message is: Sun, 5 Aug 2018 07:41:45 +0000

    The address to which the message has not yet been delivered is:

    tester@email-test.had.dnsops.gov
    host email-test.had.dnsops.gov [129.6.100.206]
    Delay reason: SMTP error from remote mail server after pipelined MAIL FROM:<info@aaaaaamydomain.nl> SIZE=6263:
    451 4.1.8 Domain of sender address info@aaaaaamydomain.nl does not resolve

    No action is required on your part. Delivery attempts will continue for
    some time, and this warning may be repeated at intervals if the message
    remains undelivered. Eventually the mail delivery software will give up,
    and when that happens, the message will be returned to you.
    DUTCH GERMAN, GERMAN DUTCH

  3. #3
    Join Date
    Jul 2008
    Location
    Maastricht
    Posts
    3,464
    Ah great, then the issue is not on my side.

    Thank you very much for testing ikkeben!
    Greetings, Richard.

  4. #4
    Join Date
    Jul 2008
    Location
    Maastricht
    Posts
    3,464
    No need for that.
    Greetings, Richard.

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