If it's any of these variables, or any that you've added as long as these functions were set up for them, I think you could by making a template within OST admin panel->emails->templates
%id Ticket ID (internal ID)
%ticket Ticket number (external ID)
%email Email address
%name Full name
%subject Subject
%topic Help topic (web only)
%phone Phone number | ext
%status Status
%priority Priority
%dept Department
%assigned_staff Assigned staff (if any)
%createdate Date created
%duedate Due date
%closedate Date closed
%message Message (incoming)
%response Response (outgoing)
%note Internal note
%staff Staff's name (alert/notices)
%assignee Assigned staff
%assigner Staff assigning the ticket
%url osTicket's base url (FQDN)
If it's another database and or table that you want to pull it from you'd have to either make a function like the ones above that pulls from that database or find the trigger where it sends the email and look at attaching something to it.
