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Email Headers

Posted on 2011-03-21
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Last Modified: 2012-08-13
I am having issues with email.  One of my clients emails don't arrive until a full day, sometimes more, later.  
My ISP claims they are not to blame. What do you see on this headers? Who can i point the finger at?
Received: from mail-out4.zzzz.com ([17.254.13.23] verified)
  by fe.mail.megapathdsl.net (CommuniGate Pro SMTP 5.3.5)
  with ESMTPS id 879188414; Wed, 16 Mar 2011 09:17:03 -0700
Received-SPF: pass
 receiver=fe.mail.megapathdsl.net; client-ip=17.254.13.23; envelope-from=user@zzzz.com
Received: from relay11.zzzz.com (relay11.zzzz.com [x.x.x.x IP])
    by mail-out4.zzzz.com (Postfix) with ESMTP id 78463D8ECF22;
    Mon, 14 Mar 2011 12:49:30 -0700 (PDT)
X-AuditID: 11807130-b7b5eae000005ccb-53-4d7e714ae9b7
Received: from rc0801a-dhcp210.zzzz.com (rc0801a-dhcp210.zzzzz.com
    by relay11.zzzz.com (Apple SCV relay) with SMTP id CC.26.23755.A417E7D4; Mon, 14 Mar 2011 12:49:30 -0700 (PDT)
Subject: Re: Dish soap in break rooms
Mime-Version: 1.0 (zzzz Message framework v1081)
Content-Type: text/plain; charset=us-asci
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Question by:cheto06
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4 Comments
 
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by:Draxonic
ID: 35186518
mail-out4.zzzz.com received it from relay11.zzzz.com at Mon, 14 Mar 2011 12:49:30 -0700 (PDT)

but

fe.mail.megapathdsl.net didn't receive it from mail-out4.zzzz.com until Wed, 16 Mar 2011 09:17:03 -0700


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Author Comment

by:cheto06
ID: 35186584
so the one delaying it is  mail-out4.zzzz.com, correct? Which is my client's server.  My ISP is correct then, it is nothing wrong with them?
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Expert Comment

by:Draxonic
ID: 35186689
Well, it's going to be one of those.

You would need to refer to the logs on the server for more information.
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Draxonic earned 500 total points
ID: 35186701
To clarify the above. All we really know from that header is the info in my first post above.

So the delay was in the connection between those two hosts.

We don't know which host caused the delay, but given that mail-out4.zzzz.com received the message in a timely manner, it was clearly functional at the time. Given that it's your clients server, your client should be able to refer to the logs on that server and see what was occurring to that message while the server was attempting to transmit it to fe.mail.megapathdsl.net.

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