You could use the built in options of Outlook and/or express.
Just create a rule something like this ...
Where the 1st OR 2nd OR 3rd criteria is met stop processing more rules.
Delete everything from the server.
You may want to test this with a small number of messages on the server.
If you miss a rule or two your messages will vanish. :-)
> Does anyone know of a utility, patch, or other means to
> reverse the block list into an acceptance list. I
> believe it would be much easier if I could list only
> those domains from which I would accept messages.