Sorry if this really is a stupid question. I want to use 'Run'. Precisely what triggers it? Is it receipt of the email or what? How do I restrict the 'Run' to messages in just one subfolder? (I am trying to analyse data which is received daily and diverted to a special subfolder. This subfolder is used for this purpose only.)
These are filter actions, so they are triggered when an email is received that matches some criteria. So if, for example, you have a filter that says "if Subject Contains 'runme' then run file 'c:\temp\printsomething.exe'" then when an email is received with that subject, the program 'printsomething.exe" will execute.