Mis mails se regresan

[Fernando Avila Matinez]

Buen dias lista,

Desde ya hace algunos dias, mi servidor de correo me rebota los mails
que envio por ejemplo a servidores de hotmail, yahoo, todito, etc. En
este caso trate de enviar una mail a hotmail y se me regreso, aqui les
pongo en mail que me regreso, mi ingles es muy pero muy malo, jajaja, 
espero me ayuden saludos,

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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:

  pc_ario en hotmail.com
    SMTP error from remote mailer after MAIL
FROM:<ferimart en eljorullo.com.mx> SIZE=1575:
    host mx4.hotmail.com [65.54.244.232]: 550 Mail rejected by Windows
Live Hotmail for policy reasons. We generally do not accept email from
dynamic IP's as they are not typically used to deliver unauthenticated
SMTP email to an Internet mail server. http://www.spamhaus.org maintains
lists of dynamic and residential IP addresses. Contact your ISP to
determine which authorized SMTP relay servers to send your mail through
(or) request a static and dedicated IP before attempting to send mail.
For additional information about Microsoft's technical guidelines,
please refer to:
    http://postmaster.live.com/Guidelines.aspx

------ This is a copy of the message, including all the headers. ------

Return-path: <ferimart en eljorullo.com.mx>
Received: from [192.168.0.200] (helo=[192.168.0.200])
        by reyna.eljorullo.com.mx with esmtp (Exim 4.50)
        id 1Igj4c-0007jM-TR
        for pc_ario en hotmail.com; Sat, 13 Oct 2007 10:38:42 -0500
Subject: Este es un mail de prueba!
From: Fernando Avila Matinez <ferimart en eljorullo.com.mx>
To: pc_ario en hotmail.com
Content-Type: text/plain
Date: Sat, 13 Oct 2007 10:45:34 -0500
Message-Id: <1192290334.9141.0.camel en volga500.eljorullo.com.mx>
Mime-Version: 1.0
X-Mailer: Evolution 2.10.1 
Content-Transfer-Encoding: 7bit

Esto es solo mail de prueba;