I am thinking of building a template to apply only for a certain automated email that our ServiceDesk gets.  It has the same Subject line cadence for every email "Termination Request: USERNAME" with username being unique in each email.  I have a business rule for any emailed incident that starts with "Termination Request:" and right now it routes correctly while having the subject and description intact.

I would like to apply a template that also sets the priority, changes a couple other unique drop downs and creates a task.  If I keep the subject and description fields blank in the template will it keep what the automated system has?  Or do I have to modify the Subject field?

i don't want the hassle of creating a script to create a task with the business rule if I can apply the template and easily modify that in the future.