development smtp server for windows [closed]

There are a few:

• SMTP Impostor (formerly Antix SMTP Server), NuGet package – looks very good
• Dumbster – fake SMTP server under Apache license

Or you can also set it up in your web.config to just store the e-mails in the file system (the config way of what “silky” has proposed in code):

<system.net>  
   <mailSettings>  
      <smtp deliveryMethod="SpecifiedPickupDirectory">  
         <specifiedPickupDirectory 
             pickupDirectoryLocation="c:\temp\mails\"/>  
      </smtp>  
   </mailSettings>  
</system.net>  

Marc