I want to create a rule that looks in the BODY and if it finds a certain string (for example "MY TEXT STRING") the rule should prepend the following to the subject line ( **Important** ) . I can't find a way to do it. Any ideas ? Thanks.
That's not possible using Rules - you can't write to the subject field with a rule and they do poorly with words in the body if the body is HTML. (It looks at raw html).
You would need to use a COM Addin, which requires C# or VB programming skills. (Which I don't have.)