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Outlook.com mail gets rejected due DKIM check

Discussion in 'E-mail Discussion' started by rhm.geerts, May 7, 2019.

  1. rhm.geerts

    rhm.geerts Well-Known Member

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    Hello.

    Since recently (don't know exactly when) it's not possible to receive emails from outlook.com so also not from office 365 customers.
    The cause is that the pub-key is not available:
    Code:
    rejected DKIM : DKIM: encountered the following problem validating outlook.com: pubkey_unavailable
    We also have this on our DA servers with almost the same notice:
    Code:
    (EUR01-DB5-obe.outbound.protection.outlook.com) [40.92.64.40] Warning: DKIM: Invalid. reason='pubkey_unavailable'.  May be a temporary problem.
    However, there the mails are not rejected.

    We do have this setting enabled.
    Is there a way to keep this enabled, but don't reject mail only when pubkey is not available?
     
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    Hello @rhm.geerts,

    Can you open a support ticket so we can take a closer look at an affected system? You can post the ticket number here and we'll link this thread to it.

    Thank you.
     
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  3. rhm.geerts

    rhm.geerts Well-Known Member

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    I'll have a try.
    We have a cpanel license via Hetzner datacenter, so I'm not exactly sure how to do this, I'll try to look it up, create a ticket and mention it here.
     
  4. rhm.geerts

    rhm.geerts Well-Known Member

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    Hello.
    I found out.
    The support ticket number is: 12225007

    Regards,
    Richard.
     
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  5. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    Hello @rhm.geerts,

    Thank you for opening the support ticket.

    To update, here's a summary of the workaround provided by the Technical Analyst assigned to the ticket:

    Additionally, an issue where custom changes made through WHM >> Exim Configuration Manager >> Advanced Editor conflict with how the option is saved in WHM >> Exim Configuration Manager >> Basic Editor was also discovered. This particular issue is discussed on the following thread:

    In Progress - [CPANEL-17032] Exim Configuration Manager - conflicting values in Basic and Advanced Editor

    Thank you.
     
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  6. rhm.geerts

    rhm.geerts Well-Known Member

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    Yes thank you.

    Unfortunately this workaround for the not published dns record does not work:
    As you can read from the rest of the ticket, this option should contain hostnames, not domain names and is not working with domain names like outlook.com for example. Next to that, there are others which also have the same issue. Big ones like Gmail also is not having the dns entry needed.
    It's very odd that a company like Microsoft which sets all kinds of rules to be able to send mail to their servers, do not obide their own rules of perfectness and do not publish the DKIM dns record. :)

    So at this moment we decided to disable the setting in total, which at first did not work, because of the conflicting values issue.
    But this was perfectly discovered and solved by Samual which excellently helped us.
     
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