Do you currently use a 'Graphic Header' to display your clinic information? The good thing about a graphic header is that your clinic contact information is incorporated into the image, so you can add additional information like your email address or website. You can see more information on submitting a header image at http://www.smartsoft.com.au/logorequest.
Otherwise it is fairly common to see practices use the third address line to enter an email address, if it isn't already being used. Our Helpdesk can assist if you'd like to do this.