Problem sending email

Problem sending email

Hello, When i send an email or anybody in my organization send an email, we get an bounce email, for example:

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. 

jaimeavillegas@hotmail.com Domain Not Resolved 


Received:from mail.zoho.com by mx.zohomail.com 
    with SMTP id 1393533676037368.97328079820556; Thu, 27 Feb 2014 12:41:16 -0800 (PST) 
Message-ID:<144751469d6.6329597217288317713.3843706021864475735@tecnoseguro.com
Date:Thu, 27 Feb 2014 15:41:15 -0500 
From:Jaime Andrés Villegas - TECNOSeguro <jaimevillegas@tecnoseguro.com
User-Agent:Zoho Mail 
To:<jaimeavillegas@hotmail.com
Subject:Prueba 
Content-Type:multipart/alternative; 
    boundary="----=_Part_348673_1577854079.1393533675989"















Thanks for your help

Director www.TECNOSeguro.com