sendmail config

[Whitley GS11 Cecil H]

Hi,
I am digging through sendmail docs in an attempt to set it up as a relay for
two domains.  If someone has this done and doesn't mind sharing their config
files, I could definately use the help.  In particular, I need to lock it
down to recieve for two domains only.  Outbound traffic will not be relayed.
I need to make sure it isn't an inviting target for spammers.
Thanks,
Cecil