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All hosts for 'domain.com' have been failing for a long time

Discussion in 'E-mail Discussion' started by thepaperdragon, Nov 3, 2018.

  1. thepaperdragon

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    Hi Guys, I already searched and applied the solution from other thread with same title but still I cannot resolve this issue. May be you have an idea to resolve this issue. Please see the results of exigrep below.

    Code:
    [root@hosting ~]# exigrep john.diaz@domain.com /var/log/exim_mainlog
    2018-10-30 16:36:09 1gHPVQ-0001vI-KS H=vxxx-xx-xx-xx.4l0s.static.cnode.io (server.domain.com) [xxx.xx.xx.xx]:42646 Warning: "SpamAssassin as comda5 detected message as NOT spam (-0.1)"
    2018-10-30 16:36:09 1gHPVQ-0001vI-KS <= john.diaz@domain.com H=vxxx-xx-xx-xx.4l0s.static.cnode.io (server.domain.com) [xxx.xx.xx.xx]:42646 P=esmtps X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no S=5687 id=03db01d4702b$8255c230$87014690$@domain.com T="Test Mail (DAPS to domain.com)" for it@domain.com
    2018-10-30 16:36:09 1gHPVQ-0001vI-KS SMTP connection identification D=domain.com O=it@domain.com E=jovert.galang@domain.com M=1gHPVQ-0001vI-KS U=comda5 ID=1000 B=redirect_resolver
    2018-10-30 16:36:09 1gHPVQ-0001vI-KS Sender identification U=comda5 D=domain.com S=it@domain.com
    2018-10-30 16:36:10 1gHPVQ-0001vI-KS => armin.mojica (armin.mojica@domain.com, it@domain.com) <it@domain.com> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <armin.mojica@domain.com> qFWgOfkX2FtaHQAAmrBV5Q Saved"
    2018-10-30 16:36:10 1gHPVQ-0001vI-KS -> mailmaster (armin.mojica@domain.com, armin.mojica@domain.com, it@domain.com) <it@domain.com> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <mailmaster@domain.com> qFWgOfkX2FtaHQAAmrBV5Q:2 Saved"
    2018-10-30 16:36:10 1gHPVQ-0001vI-KS -> jayson.lacson (jayson.lacson@domain.com, it@domain.com) <it@domain.com> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <jayson.lacson@domain.com> qFWgOfkX2FtaHQAAmrBV5Q:3 Saved"
    2018-10-30 16:36:10 1gHPVQ-0001vI-KS -> jeanette.munsod (jeanette.munsod@domain.com, it@domain.com) <it@domain.com> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <jeanette.munsod@domain.com> qFWgOfkX2FtaHQAAmrBV5Q:4 Saved"
    2018-10-30 16:36:10 1gHPVQ-0001vI-KS -> john.diaz (john.diaz@domain.com, it@domain.com) <it@domain.com> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <john.diaz@domain.com> qFWgOfkX2FtaHQAAmrBV5Q:5 Saved"
    2018-10-30 16:36:10 1gHPVQ-0001vI-KS -> jovert.galang (jovert.galang@domain.com, it@domain.com) <it@domain.com> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <jovert.galang@domain.com> qFWgOfkX2FtaHQAAmrBV5Q:6 Saved"
    2018-10-30 16:36:10 1gHPVQ-0001vI-KS => |/usr/local/cpanel/bin/autorespond jayson.lacson@domain.com /home/comda5/.autorespond (jayson.lacson@domain.com, jayson.lacson@domain.com, it@domain.com) <it@domain.com> R=virtual_aliases_nostar T:
     
  2. cPanelLauren

    cPanelLauren Forums Analyst II
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  3. thepaperdragon

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    All domain failed or bounce-back.

    Code:
    Return-Path: <>
    Received: from hosting.domain.com
        by hosting.domain.com with LMTP id 2MSpDvcc31uxLQAAmrBV5Q
        ; Mon, 05 Nov 2018 00:23:19 +0800
    Return-path: <>
    Envelope-to: john.diaz@domain.com
    Delivery-date: Mon, 05 Nov 2018 00:23:19 +0800
    Received: from mailnull by hosting.domain.com with local (Exim 4.91)
        id 1gJLBH-000331-57
        for john.diaz@domain.com; Mon, 05 Nov 2018 00:23:19 +0800
    X-Failed-Recipients: light_walker2005@domain.com,
      topman99@domain.com,
      john.diaz@domain.com
    Auto-Submitted: auto-replied
    From: Mail Delivery System <Mailer-Daemon@hosting.domain.com>
    To: john.diaz@domain.com
    Content-Type: multipart/report; report-type=delivery-status; boundary=1541348599-eximdsn-1707879264
    MIME-Version: 1.0
    Subject: Mail delivery failed: returning message to sender
    Message-Id: <E1gJLBH-000331-57@hosting.domain.com>
    Date: Mon, 05 Nov 2018 00:23:19 +0800
    X-From-Rewrite: unmodified, actual sender is mailnull
    
    --1541348599-eximdsn-1707879264
    Content-type: text/plain; charset=us-ascii
    
    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:
    
      light_walker2005@domain.com
        all hosts for 'domain.com' have been failing for a long time (and retry time not reached)
      topman99@domain.com
        all hosts for 'domain.com' have been failing for a long time (and retry time not reached)
      john.diaz@domain.com
        all hosts for 'domain.com' have been failing for a long time (and retry time not reached)
    
    --1541348599-eximdsn-1707879264
    Content-type: message/delivery-status
    
    Reporting-MTA: dns; hosting.domain.com
    
    Action: failed
    Final-Recipient: rfc822;john.diaz@domain.com
    Status: 5.0.0
    
    Action: failed
    Final-Recipient: rfc822;topman99@domain.com
    Status: 5.0.0
    
    Action: failed
    Final-Recipient: rfc822;light_walker2005@domain.com
    Status: 5.0.0
    
    --1541348599-eximdsn-1707879264
    Content-type: message/rfc822
    
    Return-path: <john.diaz@domain.com>
    Received: from [::1] (port=47974 helo=hosting.domain.com)
        by hosting.domain.com with esmtpa (Exim 4.91)
        (envelope-from <john.diaz@domain.com>)
        id 1gJLBG-00032r-4y; Mon, 05 Nov 2018 00:23:18 +0800
    MIME-Version: 1.0
    Content-Type: text/plain; charset=US-ASCII;
     format=flowed
    Content-Transfer-Encoding: 7bit
    Date: Sun, 04 Nov 2018 08:23:18 -0800
    From: john.diaz@domain.com
    To: john.diaz@domain.com
    Cc: topman99@domain.com
    Subject: Test Mail
    Message-ID: <87393b3d2663472c00ab06a8e3af56c7@domain.com>
    X-Sender: john.diaz@domain.com
    User-Agent: Roundcube Webmail/1.3.3
    X-OutGoing-Spam-Status: No, score=-1.0
    
    Test Mail.
    
    --1541348599-eximdsn-1707879264--
    
     
  4. cPanelLauren

    cPanelLauren Forums Analyst II
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    Hi @thepaperdragon

    If they're all failing you may want to check your dns resolvers. They can be found at
    Code:
    /etc/resolv.conf
    or by going to WHM>>Networking Setup >>Resolver Configuration. Documentation on this can be found here: Resolver Configuration - Version 74 Documentation - cPanel Documentation

    In most cases (unless your provider requires specific resolvers) I'd test by adding different nameservers here. Off the top of my head there's CloudFlare's resolvers:

    1.1.1.1
    1.0.0.1

    and Google's

    8.8.8.8
    8.8.4.4

    I'd test changing these and seeing if your mail sends successfully
     
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  5. thepaperdragon

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    Thanks Lauren.

    I changed the resolver of my provider with the following:
    1.1.1.1
    1.0.0.1
    8.8.8.8

    Then, I tried to send test email to 3 domain. I noticed that it stuck/queue in Mail Queue Manager, so many frozen emails majority from info@domain.com sender.
     
  6. cPanelLauren

    cPanelLauren Forums Analyst II
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    Hi @thepaperdragon


    Are you indicating that you did not get the same error message but noticed that there are a lot of emails stuck in queue? If this is the case you'll want to identify if the mail is legitimate or not. Checking the
    Code:
    /var/log/exim_mainlog
    should also provide some insights into how the mail is being sent
     
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  7. thepaperdragon

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    I did not received the error message right away that's why I checked it in Mail Queue Manager.

    Here is the bounce-back error message:
    Code:
    Return-Path: <>
    Received: from hosting.domain.com
        by hosting.domain.com with LMTP id IIpCHVDV4VsbfAAAmrBV5Q
        ; Wed, 07 Nov 2018 01:54:24 +0800
    Return-path: <>
    Envelope-to: john.diaz@domain.com
    Delivery-date: Wed, 07 Nov 2018 01:54:24 +0800
    Received: from mailnull by hosting.domain.com with local (Exim 4.91)
        id 1gK5YW-0008GJ-CT
        for john.diaz@domain.com; Wed, 07 Nov 2018 01:54:24 +0800
    X-Failed-Recipients: light_walker2005@domain.com,
      john.diaz@domain.com
    Auto-Submitted: auto-replied
    From: Mail Delivery System <Mailer-Daemon@hosting.domain.com>
    To: john.diaz@domain.com
    Content-Type: multipart/report; report-type=delivery-status; boundary=1541526864-eximdsn-987734006
    MIME-Version: 1.0
    Subject: Mail delivery failed: returning message to sender
    Message-Id: <E1gK5YW-0008GJ-CT@hosting.domain.com>
    Date: Wed, 07 Nov 2018 01:54:24 +0800
    X-From-Rewrite: unmodified, actual sender is mailnull
    
    --1541526864-eximdsn-987734006
    Content-type: text/plain; charset=us-ascii
    
    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:
    
      light_walker2005@domain.com
        retry timeout exceeded
      john.diaz@domain.com
        all hosts for 'domain.com' have been failing for a long time (and retry time not reached)
    
    --1541526864-eximdsn-987734006
    Content-type: message/delivery-status
    
    Reporting-MTA: dns; hosting.domain.com
    
    Action: failed
    Final-Recipient: rfc822;john.diaz@domain.com
    Status: 5.0.0
    
    Action: failed
    Final-Recipient: rfc822;light_walker2005@domain.com
    Status: 5.0.0
    
    --1541526864-eximdsn-987734006
    Content-type: message/rfc822
    
    Return-path: <john.diaz@domain.com>
    Received: from [::1] (port=59334 helo=hosting.domain.com)
        by hosting.domain.com with esmtpa (Exim 4.91)
        (envelope-from <john.diaz@domain.com>)
        id 1gK59r-0007Gi-Cl; Wed, 07 Nov 2018 01:28:57 +0800
    MIME-Version: 1.0
    Content-Type: text/plain; charset=US-ASCII;
     format=flowed
    Content-Transfer-Encoding: 7bit
    Date: Tue, 06 Nov 2018 09:28:55 -0800
    From: john.diaz@domain.com
    To: john.diaz@domain.com
    Cc: topman99@domain.com
    Subject: Test Mail (3 DOMAIN)
    In-Reply-To: <0a671a406b6714146290632b78bb56fb@domain.com>
    References: <0a671a406b6714146290632b78bb56fb@domain.com>
    Message-ID: <9f31d38d17204b674eb56a130c20f059@domain.com>
    X-Sender: john.diaz@domain.com
    User-Agent: Roundcube Webmail/1.3.3
    X-OutGoing-Spam-Status: No, score=-1.0
    
    Test Mail.
    
    --1541526864-eximdsn-987734006--
    
    The recipients are my personal email accounts, it is legit.

    I just use it for email testing. Our domain has no problem in incoming emails, the only problem is the outgoing emails, we received bounce-back, not receive by the recipients.

    Thanks.
     
  8. cPanelLauren

    cPanelLauren Forums Analyst II
    Staff Member

    Joined:
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    Hi @thepaperdragon


    Can you confirm that you're using the following:
    • SPF
    • DKIM
    • A valid PTR record
    If these three items are configured I'd lean towards a DNS issue, though it's hard to be sure without access to the server or knowing the domain name. You might try one of the tools like mxtoolbox to check mail server to ensure it's configured properly as well. If none of your mail is being sent you might also check with your provider to ensure that they allow SMTP on port 25
     
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