title: IIS SMTP settings and Host setting in web.config in ASP.Net
body: <p>In IIS7, there is SMTP settings where you can specify the SMTP server for ASP.Net application to use. 
  In Web.Config, you can also settup the host and port the SMTP server.</p>
  
  <p>My question is: What's the difference between the two?</p>
  
  <p>Thanks</p>