If you are just setting up
the first filter the box will be empty. Click on the Add button. A dialog box is displayed
which allows you to specify the type of message the filter will apply to (to a certain
address, from a certain sender, on a certain subject, above a given size etc) Below is the
action to be taken if a message meets the criteria. These actions include move or copy to
a folder, forward, reply with a preset message, don't download from the server or delete
from the server.

Click to enlarge...