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Mail delivery failed: returning message to sender

Discussion in 'E-mail Discussion' started by rorisang, Sep 5, 2018.

  1. rorisang

    rorisang Registered

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    Good day

    May I please be assisted with the error below. Some emails go through and some do not. I used different accounts, it seems that i have this error with one email account.

    Code:
    "
    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:
    
    xxxxxx@gmail.com
    host gmail-smtp-in.l.google.com [64.233.167.26]
    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. k3-v6si1282756wrh.237 - gsmtp
    Reporting-MTA: dns; xxxx.dedicated.co.za
    
    Action: failed
    Final-Recipient: rfc822;xxxxxx@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. k3-v6si1282756wrh.237 - gsmtp
    Return-path: <xxxxx@xxxx.co.za>
    Received: from [105.12.x.xxx] (port=46475 helo=someusr)
    by xxxx.dedicated.co.za with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-SHA384:256)
    (Exim 4.91)
    (envelope-from <xxx.xxxx@xxxxp.co.za>)
    id 1fxTcC-0000s4-Kw
    for xxxxx@gmail.com; Wed, 05 Sep 2018 10:56:45 +0200
    Reply-To: <xxxx@zxxx.co.za>
    From: "xxxxxxx" <xxxx.fm@zxxxx.co.za>
    To: <xxxxxx@gmail.com>
    References:
    In-Reply-To:
    Subject: subject line here
    Date: Wed, 5 Sep 2018 10:56:43 +0200
    Organization: xxxxxxxx
    Message-ID: <008b01d444f6$5f01bce0$1d0536a0$@zxxxxx.co.za>
    MIME-Version: 1.0
    Content-Type: multipart/mixed;
    boundary="----=_NextPart_000_008C_01D44507.228CFDE0"
    X-Mailer: Microsoft Outlook 15.0
    Thread-Index: AdRE9iCgebDiQtcHSpeDwtrb7jvI4AAACNvw
    Content-Language: en-za
    X-Antivirus: AVG (VPS 180904-4, 2018-09-04), Outbound message
    X-Antivirus-Status: Clean
    X-Exim-DSN-Information: Due to administrative limits only headers are returned
    
     
    #1 rorisang, Sep 5, 2018
    Last edited by a moderator: Sep 5, 2018
  2. dalem

    dalem Well-Known Member PartnerNOC

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    Enable DKIM
    &
    Enable SPF
     
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  3. rorisang

    rorisang Registered

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    Thank you. i have enabled Enable DKIM & Enable SPF on my cpanel--> email-->authentication.

    The warning that i get is that "Warning: cPanel is unable to verify that this server is an authoritative nameserver for “example.co.za”." how do i move forward from this?
     

    Attached Files:

    #3 rorisang, Sep 5, 2018
    Last edited by a moderator: Sep 5, 2018
  4. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

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    Hello @rorisang

    This indicates that your DNS is hosted elsewhere meaning that your nameservers are pointed somewhere else. You will not be able to enable SPF on the server locally (or add any DNS records locally) if the DNS is hosted somewhere else. You'll need to add the SPF where DNS for the domain is hosted (Where the nameservers are pointed)

    Thanks!
     
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  5. rorisang

    rorisang Registered

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    i
    have added records the error has changed to " host za-smtp-inbound-2.mimecast.co.za [IP REMOVED]
    SMTP error from remote mail server after RCPT TO:<xxx@xxx.com>:
    550 csi.mimecast.org Poor Reputation Sender. - Mimecast SMTP Error Codes | Mimecaster Central
     
    #5 rorisang, Sep 6, 2018
    Last edited by a moderator: Sep 6, 2018
  6. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

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    Hi @rorisang

    This indicates that the IP address your mail originated from has a poor reputation and the recipient server is blocking based on this - this can be due to incorrect SPF, DKIM or PTR or due to recent spam mail being sent. Because you just changed the SPF and DKIM records I believe it makes more sense to look at that avenue.

    Based on the original domain name visible in the first post (pre-edit) - if you're still using the .co.za domain there are still issues with it.

    - You've added an SPF record that checks out but there is no DKIM record. When running the following I get no response:
    Code:
    dig txt default._domainkey.yourdomain.co.za +short
    - There are 4 differen PTR records associated with the IP address there should only be 1 PTR record that resolves the IP of the server back to the hostname of the server. You can see this by running:

    Code:
    host <YourIPAddress>
     
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  7. rorisang

    rorisang Registered

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    I adjusted SPF and DKIM records accordingly. Upon research, it turns out that the challenge is that my IP address is blacklisted. I do not know what that means. Do anyone know how to delist a blacklisted IP address?
     
  8. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

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