There is a helpdesk setting which requires the end user to confirm a ticket they submitted (via their email). This acts as a spam catch.
The main setting is managed in `Admin Settings > Helpdesk Configuration`. Scroll down until you see the "Tickets Pending Confirmation" section.
When this is turned ON, the end user is required to confirm their ticket, meaning their ticket will not be created automatically in the helpdesk. Rather these tickets will sit in the `Pending Confirmation` until they are confirmed by the user.
Alternatively, Agents can check view and confirm these tickets internally. Go to `Admin Settings > Pending Confirmation`. Here you will find a list of tickets waiting to be confirmed. Note it is recommended that admins go through the pending list regularly to confirm any legitimate tickets.
This is one of the many ways Mojo prevents spam in your helpdesk.