Mike is right, it varies. I replied to my fix it email with a formally formatted email. I thanked them, provided a quick couple lines saying I made the appropriate corrections, and follow up contact info. My other buddies who did this also got hired. The emails are directly routed to the head of pilot selection, and I think that he does actually read them. Don't be discouraged if its a lot of fixing. My application went from 4 pages to 15 pages after my fix it email because I hadn't broken down all of my military experience by base, deployment, assignment, schools, etc. It was just one big block haha oops.