Sendmail configuration to relay mails to external domains

[Ramakrishnan Seshadhri]

Hi Everyone,

I have send mail service configured on RHEL 5 machine and I am able to send
mails within my domain (intranet).
But when I try to send mails out side my domain it fails to relay the
messages.
Could somebody tell me how to configure sendmail to send mails out of the
home domain.

Ram