ASP.NET: Tracking dynamic subdomaiins
<p>My company wants to mail out postcards asking the recipient to visit a website for add'l information.  The url on the postcard will contain a unique subdomain, for tracking purposes.</p>

<p>So for example, John Smith's url will look like johnsmith.mysite.com.  Amy Johnson's postcard url will be amyjohnson.mysite.com, etc.</p>

<p>So, 2 questions.  One, can url's be setup in this fashion?  We would be sending thousands of unique postcards, so manually setting up subdomain's on our web host's admin section isn't realistic.  And two, how in asp.net, could I capture just the subdomain?</p>

<p>Thanks</p>