[CentOS-es] Hotmail rechaza correos!!

[Felipe Cabada]

Hola Lista, alguien me puede ayudar, *este correo me regresa en el servidor:
*
The original message was received at Tue, 5 Jun 2012 12:41:50 -0700
from [192.168.3.95]

  ----- The following addresses had permanent fatal errors -----
<arturoknappr en hotmail.com>
   (reason: 550 SC-001 (BAY0-MC4-F22) Unfortunately, messages from
201.120.73.244 weren't sent. Please contact y...ock list. You can also
refer your provider to http://mail.live.com/mail
/troubleshooting.aspx#errors.)

*En el servidor me sale este mensaje:*

Jun 13 11:30:12 www sendmail[17151]: q5DIUCsN017149: to=<
fcabada02 en hotmail.com>, ctladdr=<galdaco en www.dlp.com.mx> (538/538),
delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=120770, relay=
mx1.hotmail.com. [65.55.92.136], dsn=5.0.0, stat=Service unavailable
Jun 13 11:30:12 www sendmail[17151]: q5DIUCsN017149: q5DIUCsN017151: DSN:
Service unavailable

*Ya he revisado en varias paginas y no estamos en listas negras,
mxtoolbox.com*

*Tengo el Registro TXT* =  "v=spf1 mx ip4:201.120.73.244 mx:www.dlp.com.mx~all"

Y aun no puedo enviar correos a hotmail,

Alguna pista para leer y poder eliminar este problema??

Saludos!!


-- 
--
LCC Felipe Humberto Cabada Arismendiz