Q. Can you tell me in which component, file, etc is it that I configure the mail host that should be used to send out the password reminders.
A.
You can configure mail settings of your application as follows:
InsertAfter: /configuration/connectionStrings
<system.net>
<mailSettings>
<smtp deliveryMethod="Network" from="ben@contoso.com">
<network
host="localhost"
port="25"
defaultCredentials="true"
/>
</smtp>
</mailSettings>
</system.net>
Note that InsertAfter instruction will insert the XML snippet just after the connectionStrings section in Web.Config configuration file of your application.
You can learn more about configuring mailSettings at http://msdn.microsoft.com/en-us/library/w355a94k.aspx.