Hi Kim,
Yes, you cannot post your email address under RootsChat guidelines. However, you can pass it using the Personal Message (PM) system. Under Rainy's name, you will see a small icon like a piece of paper with 3 little lines. Press on that with your pointer (arrow) and it will open up a personal message, you can put your email in here securely. Unfortunately you cannot attach photos etc to the PM, but you can do that when you connect with email.
Tom