How to install SMTP on Windows 7?

Hi - I've followed the directions to download 

http://support.microsoft.com/kb/974877/en-us[^]

and configure

http://technet.microsoft.com/en-us/library/cc772058(WS.10).aspx[^]

but the .eml files just pile up in the /pickup directory.

It seems like SMTP is not runing, although I can see the config in IIS

Any help would be appreciated.

thaks