Sure, I stated earlier this task requires to build search on email subject / body and extract mail body in plain text CSV. The CSV output will be fed to another process that would categorise, sort and include additional insights that will add value to the user of the app.
The search will be on users choice of email address (yahoo, google, outlook).
Search pattern/format will not be keyed-in by the user it is handled by the core functionality that gathers insights.