IIS URL Rewrite for domain
===

I would like to only redirect(301) the domain entry to another url, but any request that has something after the domain, should just fall through, e.g.

http://mydomain.com should redirect to http://newdomain.com/somepage

and

http://mydomain.com/somepage/somewhere should fall through to our internal 301 handler.

In URL rewrite module, I have the following rule setup:

Match URL

 - Requested URL: Matched the Pattern
 - Using: Regular Expression
 - Pattern: (.*)

Conditions

 - Input: {HTTP_HOST} Matches the pattern ^mydomain\\.com$
 - Input: {REQUEST_URI} Matches the pattern /$

Even a request of http://mydomain.com/somepage/somewhere, is being redirected to http://newdomain.com/somepage

Confused as to how to create this rule.