If you would like to share your email with another user without the entire community seeing your email address, you can make a post on user's page that includes your email and we will hide the email address from the entire community except for you and the page owner.
To make sure you are posting to their wall click on their name or photo to be taken to their wall.
Everyone except for you and the wall owner will see the following:
This will also work on comments in the same post to another's page. If you do post your email in a regular post that is not a wall to wall post, it will display to everyone.