Each time I send an email, expecting an answer, I use "send and file" option then file in my "-waitingfor" folder. I review my folder on a regular basis.
Each time I receive an email, process it and decide "what's next", I use "copy to" than "new task", add some comments on the next physical action to take on the heading, add category (context that I've setup). That's it.
This setup is based on white paper "GTD and Lotus Note" that Connect Member can get. It is also available for non-connected on davidco.com website. I personalysed the "copy to next task" process.
Hope it will help.