[SunHELP] sendmail problem

[sunhelp at sunhelp.org]

I am running solaris8, using mailx from CLI I am able to send mail from
my Unix machine to Microsoft Outlook but when I setup mailx to send mail
from cron job it does not work.  It just sends mail to unix local host
instead of Microsoft Outlook.  Do you have any idea of what wrong?
Below is mailx command I use to send mail in cron job.

Mailx -s "SUBJECT"  david.m.nguyen at xo.com < /etc/nodename

Thanks,
David