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New dedicated Server: Mail Delivery Error

Discussion in 'Bind / DNS / Nameserver Issues' started by the_Dsigner, Jun 19, 2015.

  1. the_Dsigner

    the_Dsigner Active Member

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    Hey Guys,

    I just setup my dedicated server last month and I"m just getting around to working with it and noticed today that the WP install on one of the Cpanel accounts wasn't sending out notification emails. I setup email accounts through each Cpanel and tried sending and receiving emails for each one. I can receive emails from the outside, but when I attempt to send anything to any email I immediately get a "Mail delivery failed: returning message to sender"

    Where do I start to try and solve this? Its probably a DNS issue.
     
  2. the_Dsigner

    the_Dsigner Active Member

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    This message was created automatically by mail delivery software.

    Code:
    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:
    
    example@hotmail.com
    host mx4.hotmail.com [65.55.37.88]
    SMTP error from remote mail server after MAIL FROM:<main@example.org> SIZE=1708:
    550 OU-002 (COL004-MC2F3) Unfortunately, messages from 64.15.67.98 weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
    
    ------ This is a copy of the message, including all the headers. ------
    
    Return-path: <main@example.org>
    Received: from localhost ([::1]:48278 helo=64.15.67.98)
    by hotname.example.org with esmtpa (Exim 4.85)
    (envelope-from <main@example.org>)
    id 1Z60V6-0008De-Js
    for example@hotmail.com; Fri, 19 Jun 2015 13:54:48 -0400
    MIME-Version: 1.0
    Content-Type: text/plain; charset=US-ASCII;
    format=flowed
    Content-Transfer-Encoding: 7bit
    Date: Fri, 19 Jun 2015 13:54:48 -0400
    From: hostname <main@example.org>
    To: example@hotmail.com
    Subject: test
    Message-ID: <55c4dc02a053e4582950df566f9f2cea@example.org>
    X-Sender: main@example.org
    User-Agent: Roundcube Webmail/1.0.5
    
    This is what I get.
     
    #2 the_Dsigner, Jun 19, 2015
    Last edited by a moderator: Jul 13, 2015
  3. Infopro

    Infopro cPanel Sr. Product Evangelist
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    Twitter:
    Please don't post details with actual email addresses in them on a public forum.

    The error message clearly states the IP is on a blocked list.

    Feel free to repost with actual details modified..
     
  4. the_Dsigner

    the_Dsigner Active Member

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    o.k its a brand new IP that has never been used for sending email. How can it be on a blocked list?
     
  5. Infopro

    Infopro cPanel Sr. Product Evangelist
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    Twitter:
    Brand new to you. :)

    The IP must have been blocked prior to you getting it I guess. You'll need to contact them and see about having it unblocked.
     
  6. the_Dsigner

    the_Dsigner Active Member

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    I just checked and I forgot to setup my reverse DNS (PTR). Is this something that can be done from the root WHM or does my hosting provider have to implement this?
     
  7. Arkaic

    Arkaic Member

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    Your hosting provider would need to do this, the option may be available in their control panel.
     
    sanjib1 likes this.
  8. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello :)

    You can contact your hosting provider and ask then to configure RDNS for your IP address pointing to the hostname of your server. Also, it's a good idea to enable SPF via the "Email Authentication" option in cPanel.

    Thank you.
     
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