Do not require email address

I have the ability to run a local install of osTicket on our server, which in that case I would not require authentication at all. Since my users aren't utilizing their email notifications to begin with, I wondering if it is able to mark the field for email address (upon ticket submission) as not required.

I understand this may be an odd solution, but it's the direction I am being asked to go down. Any help would be appreciated.

Thanks in advance,

mperlove