After clicking "View Invitation" on the invitation email, you will be automatically directed to the invitation where you can RSVP. Simply click on either Yes, Maybe or No, include an optional comment and click "Reply." Your RSVP and comment will then appear on the invitation.
You do not need an Evite account to RSVP to an event.
If you have already submitted your RSVP and want to change it, simply go back to the invitation and select "Change Reply."
Please note,....you must RSVP directly on the Evite site through the invitation link you received in the email for it to save, instead of RSVPing on the email itself.