Multiple window interface for Mailshot Configuration Editor:

 Powerful data manipulation using Excel Add-in:

 OxiSMTP Receiver

The OxiSMTP Receiver will never send any mail, but will log as though it were a normal SMTP Server and will save received files if required. Written in unmanaged C++ using Microsoft Foundation Classes it is small and quick. It is multi-threaded so is capable of managing multiple connections at one time.