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How to troubleshoot 'Mail delivery failed: returning message to sender' error?I

Discussion in 'E-mail Discussion' started by ImSimanto, Jun 4, 2018.

  1. ImSimanto

    ImSimanto Registered

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    I'm using a cPanel VPS. Facing an issue with an account on my VPS. When I'm trying to send email I'm getting the error report below:

    =========================================================
    This message was created automatically by mail delivery software.

    A message that you sent could not be delivered to one or more of its
    recipients. This is a permanent error. The following address(es) failed:

    email@gmail.com
    host gmail-smtp-in.l.google.com [74.125.197.26]
    SMTP error from remote mail server after end of data:
    550-5.7.1 This message does not have authentication information or fails to pass
    550-5.7.1 authentication checks. To best protect our users from spam, the
    550-5.7.1 message has been blocked. Please visit
    550-5.7.1 Bulk Senders Guidelines - Gmail Help for more
    550 5.7.1 information. 31-v6si12778261plc.173 - gsmtp
    Reporting-MTA: dns; thunder.example.com

    Action: failed
    Final-Recipient: rfc822;email@gmail.com
    Status: 5.0.0
    Remote-MTA: dns; gmail-smtp-in.l.google.com
    Diagnostic-Code: smtp; 550-5.7.1 This message does not have authentication information or fails to pass
    550-5.7.1 authentication checks. To best protect our users from spam, the
    550-5.7.1 message has been blocked. Please visit
    550-5.7.1 Bulk Senders Guidelines - Gmail Help for more
    550 5.7.1 information. 31-v6si12778261plc.173 - gsmtp
    ==========================================================

    Can anyone please help me in troubleshooting this issue?
     
    #1 ImSimanto, Jun 4, 2018
    Last edited by a moderator: Jun 4, 2018
  2. rpvw

    rpvw Well-Known Member

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  3. cPanelLauren

    cPanelLauren Forums Analyst II
    Staff Member

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    Hello,

    Based on the error you're receiving it looks like your domain doesn't have an SPF or DKIM:

    Code:
    550-5.7.1 This message does not have authentication information or fails to pass
    550-5.7.1 authentication checks. To best protect our users from spam, the
    You can check if your domain has these by running the following:

    Code:
    dig txt yourdomain.com
    dig txt default._domainkey.yourdomain.com 
    If it doesn't have them and your nameservers point to the server the domain is hosted on you can easily add them at cPanel>>Email>>Mail Authentication.


    Thanks!
     
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