Your potential tenant should never need to enter an email address. 1form will automatically add the correct PropertyNow details in, as long as the tenant is applying correctly. If they're being asked for an email address, they're not linked up to your listing correctly - simply direct the tenant back to your Realestate.com.au listing page and tell them to click and follow through from the 'Apply Online' button and we'll get that application to you once received.
Please note that if the application isn't linked and you receive an application directly (and not from PropertyNow in PDF format) you won't be able to open this and neither will we. Please ensure they follow the above steps.