[CentOS] Mail from domain problem

Hi,

    I installed a CentOS 4.7 server, the system information is:

# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=mail.domain11.com   

# hostname
mail.domain11.com

#echo "test " | mail -s "test mail" someone at domain22.com

I would like to receive mail is root at domain11.com, but I received is root at mail.domain11.com 



How to correct it?

(I've tested there is no problem in CentOS 5.2)

Best regards

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.centos.org/pipermail/centos/attachments/20090224/620bdc14/attachment.html>