Private Email - Jooly's Joint is noted as a good network and Webpal (Email Pal) service for all of the people who live with Multiple Sclerosis.
Mail Lists - A Mail List relays all subscriber's email to everyone else who subscribes to the list.
Bulletin Boards - On a BB you can post your thoughts and questions. Maybe there's someone who can give you an answer. Usually you will have to go back to see responses to your post.