I am trying to develop email functionaliity.

I tryed creating this sproc:

CREATE PROCEDURE sp_STML AS
declare @rc int
exec @rc = master.dbo.xp_smtp_sendmail
@FROM_NAME = 'Howard Kline',

@TO = '[email protected]',

@subject = 'Hello SQL Server SMTP Mail',

@server = 'caexmta5.amd.com'

select RC = @rc
GO

I get rc = 1 when I execute this.
What am I doing wring

Any ideas?
Thanks.