Me lo segno. Spesso mi era balzata l'idea di realizzarne uno, ma poi ero così pigro...:
If you do your development in an environment where you cannot setup your own email server and you don't want to use the production server, here is a solution for you. It's called "Dummy SMTP Server", and I found out about it on Matt Morse's blog (Click here to see Matt's Blog), the direct link to the utility is below. The best news is that it's FREE and the author has made the source code available to read/modify/learn from....
Here's the direct download for the utility: Click here
Fonte: Free Utility for Testing SharePoint/MOSS 2007 Email Sending.