Problem with .org

[Rocio Alfonso Pita <rozio@universalsupport.com>]

Hello!

  I have a problem when in file fqdnaliases I put an aliases from an
email with domain .org. If I put an aliases from another domain (for
example .com) the email is OK. 

Error message is the follow (in file /var/log/zmailer/smtpserver):

MKX520715w      220 ESMTP+IDENT mail server
ready.                              
MKX520715#      remote from
[216.115.105.247]:38925                             
MKX520715r      HELO
web4805.mail.yahoo.com                                     
MKX520715w      250 nf1.universalsupport.com Hello
web4805.mail.yahoo.com       
MKX520715r      MAIL
FROM:<frevazmat@yahoo.es>                                  
MKX520715w      250 2.1.0 Sender syntax
Ok                                      
MKX520715r      RCPT
TO:<borrar@fbarrie.org>                                  
MKX520715#      -- policy result=-3, msg:
<NONE!>                               
MKX520715w      550 5.7.1 This target address is not our MX service
client: <borrar@fbarrie.org>  

can you help me, please?

Thanks in advantage.

  Rocío Alfonso