We have setup a sender email address on our forms server that does not have an email box to accept replies.  If a user replies to a task assignment they receive a not deliverable message so they know no action or task reassignment will occur if they reply saying "I don't have time to do this."  This has worked well and the organization does not want to change this default.  

We now have a form that in some situations will need approval in just a very short time period.  We would like to send these approval tasks from an address that will allow an "Out of Office" reply to be seen by a team that could immediately reassign the task.  Is there a way to have a custom sender address for this form only?  

Thanks in advance.