Need to send different rejection emails based on the recruiting phases a candidate is in.

Need to send different rejection emails based on the recruiting phases a candidate is in. We want to add a new 'Reject - Internal / External' state, that will trigger the rejection email, then we will auto progress the candidate to the 'Rejected by Employer' state. 
There is a scenario where a recruiter may need to undo the rejection and continue recruiting the candidate for the job. To avoid the auto progression to "Rejected by EMployer" rejecting the candidate and sending a second rejection email, we need to add a fast formula to handle this scenario.
However, from the DBI's we were only able to find variables for current state IRC_CSP_JOBAPP_CSP_STATE_NAME