I've tried using the below solution (also found here: How do I set up smtp on Vista so I can use System.Net.Mail?) but I receive "Cannot get IIS pickup directory". I know I am pointing to an existing directory and my web.config are set up correctly, are there permissions I need to set up on the directory before I can write to it?
<system.net>
<mailSettings>
<smtp deliveryMethod="SpecifiedPickupDirectory">
<specifiedPickupDirectory
pickupDirectoryLocation="c:\maildrop"/>
</smtp>
</mailSettings>