InBoxer is simple to install and use, but only works with Microsoft Outlook. The software automatically scans mail as it arrives and decides if it's spam or legitimate email by referring to its built-in list of recognised 'good' and 'bad' messages.

The quick setup routine is a breeze, and when it's complete you'll find two new folders labelled 'InBoxer Blocked' and 'InBoxer Review' in your Outlook folder menu.

Any message recognised as spam is stored in the Blocked folder, while any the program's not sure about are stored in the Review folder. The contents of both folders can be checked and altered as needed.

InBoxer learns as it goes, so if a piece of spam does appear in your inbox just click the Block button on the toolbar and the application will remember it as spam.

There are also whitelist and blacklist features so you can mark email addresses or domain names as good or bad. Addresses in the whitelist will be allowed through, while those in the blacklist will be blocked.