asp.net 2.0 email settings

Hi,
I would like to be able to send emails from the asp.net 2.0 website when recovering a password using the password recovery control.
I do have the IP addresses for email Gateway and the mail server.
Where do I set these settings please? Is it somewhere in the web.config?
Thanks

<system.net>
<mailSettings>
<smtp deliveryMethod="Network">
<network defaultCredentials="True" host="10.0.0.1" port="25" from="[email protected]"/>
</smtp>
</mailSettings>
</system.net>

Where are you using the IP addresses for mail server and the email gateway please?
Thanks

This is what I have at present.
Is it ok?
<mailSettings>
<smtp deliveryMethod="network" from="[email protected]">
<network host="127.0.0.1" port="25" defaultCredentials="true"/>
</smtp>
</mailSettings>
</system.net>