SMTP Email issue

Posted on 2009-02-12
Last Modified: 2013-12-24
Having trouble sending to hotmail addresses.

Getting this error, any insight?

------ Forwarded Message
From: <>
Date: Thu, 12 Feb 2009 12:33:49 -0800
To: <>
Subject: Delivery Status Notification (Failure)

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

Reporting-MTA: dns;
Received-From-MTA: dns;
Arrival-Date: Thu, 12 Feb 2009 12:31:24 -0800

Final-Recipient: rfc822;
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;503 Improper sequence of commands

------ End of Forwarded Message
Question by:fekdep
    LVL 5

    Expert Comment

    "SMTP Error 503 : The commands have been sent in the wrong order, for example your mail server has sent the Hello command before sending the Mail command. This can often be caused by a drop in network connection just as your server was sending a command, resulting in the ISPs server not receiving it and consequently not understanding the command that followed it.

    Note : this error, particularly if repeated, can be indicative of communications problems, such as a noisy line,intermittent drops in network connections, etc..."

    Have you tried traceroutes to Hotmail?  Possible there's a bad router hop in the path your packets are going.  If this is the case, you can contact your ISP and have them update their routing tables...
    LVL 33

    Accepted Solution

    looks like an internal fault at hotmail: note the two lines:

    Reporting-MTA: dns;
    Received-From-MTA: dns;

    so it looks like the send failed when going from one hotmail server to another. refer to (but don't hold your breath; I have had them tell me seriously that mail I Have got is "spoofed" when there are only two mailservers involved, and the sender has an IP address in a range owned by microsoft and used for hotmail)

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