how to configure mail command in linux

I got the following error when I tried to send a test email. any clues?

[root@lom-appprd-02 mail]# /bin/mail - "Hello" jason@xxx.com
No mail for root
Jason YuAsked:
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Seth SimmonsSr. Systems AdministratorCommented:
you don't have any options; use -s

mail -s "Hello" jason@xxx.com

or to pipe text directly, echo foo | mail -s "Hello" jason@xxx.com

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Shiju JacobInfo Security ManagerCommented:
above command will work

make sure the MTA is running
check sendmail or postfix service is running and configured as mail relay


Thanks
Shiju
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