Get Sendmail to relay all outgoing mail to mail server

[hd2]

Hello.
I'm completly new to Sendmail, and have run into a snag.

I have two comptuers running on a local network.

192.168.0.40 is the web server.
192.168.0.30 is the mail server.

The web server is RedHat Linux 7.3
The mail server is running win 2K server and Imail

I need to tell sendmail on the web server that all outgoing mail needs to be relayed through 192.168.0.30 (the mail server).

I have tried changing the SmartHost in the sendmail.cf file to DS192.168.0.30 with no luck.

I don't need sendmail to be setup to recieve any mail, just send mail generated by web pages on the web server over to the mail server.

Any help appreciated!
Thanks
Take care