MailRisk is supposed to work as automatically as possible. There may however sometimes be a need to perform more manual analyses of suspicious emails, and this is when an authorized security expert will specifically open your email for review.
In addition, if your reported email is found to contain a particular threat, it may be reviewed by staff who is looking to build the best protections for the future.
If however your email is not found to contain any threat, its contents will be hidden from any staff unless a specific request to unlock the contents has been made. In such cases, these requests are logged in particular.