[olug] SMTP server for development?

[Eric P]

Howdy all,

I recently ran across a cool open source project called smtp4dev (Windows/.NET).  It is basically a dummy SMTP server 
where you can view all emails sent to it w/o them actually being sent on to the outside world.

As it is a .NET app I thought maybe I could compile it w/Mono, but I wondered if there wasn't already an app like this 
for Linux.  Or maybe Sendmail or Postfix could be configured to serve this purpose (i.e., dead end SMTP server).  I have 
zero experience in either of them, so smtp4dev has a lot of appeal because of its ease of set up and use.

smtp4dev
http://smtp4dev.codeplex.com/

Anyway, just looking for some ideas.

Thanks,
Eric P.