Mojo Helpdesk requires that one form is published at all times, as the helpdesk will need to use a form for any tickets that come in.
You are able to change the default form in `Admin Settings -> Ticket Forms` and then look for the Default Form box. The default form will be the one that will be used by all incoming tickets created by email. You can change the default form by clicking on the pencil icon.
It's also possible to specify a specific form for each queue. Take a look at this [KB article](https://help.mojohelpdesk.com/help/article/244219) for instructions on how to do that.