As far as I know, by default, your e-mail should be hidden. To check to see if anyone can see your e-mail, go to your profile and log out-- there shouldn't be an e-mail there. If there is, then it will be visible to anyone who views your page. We've been having the issue with users being able to contact you through the e-mail icon, which had to due with some of the forum changes, but we just have to wait for Raz to look into it. If you're imminently concerned that someone may contact you whom you don't wish to speak to, or if you're generally worried about the access to it, I would recommend changing your e-mail address via the User Panel (found in the golden box at the top-right corner of your screen, on the front page of the website) to an alternate or junk e-mail. Just make sure you have access to it and ensure that it doesn't become inactive, or difficulty changing the e-mail later may occur.
Patience is all we can do for now, until Raz is able to look into it.~ Hopefully this helps a bit, but we're sorry for the inconvenience!