Cw in practice only ends up controlling which domain names you accept
for local delivery -- it has no impact on outgoing mail.

John M Vinopal writes:
> i suspect your configurations are botched.
> 
> try the likes of:
> 
> Cw atrium.resort.com
> Cw mail.resort.com
> Cw ftp.resort.com
> Cw resort.com
> 
> in sendmail.cf
> 
>