I used the knot to host my wedding website. They have this neat electronic RSVP feature & allows you to use secure RSVP, so only people invited can respind. Pretty neat I thought, except the secure feature kerps reversing (3 times do far & counting). I have had multiple people not invited to my wedding RSVP to it. I've now resorted to checking the settings multiple times a day to make sure I dont end up having to tell dozens of people they werent supposed to be allowed to RSVP. Its awful! I would suggest anybody considering them for this to look elsewhere!