The user already has control of which emails they get. The problem is that these notifications actually are important to receive, since it would be bad for him

The user already has control of which emails they get. The problem is that these notifications actually are important to receive, since it would be bad for him if he never got an important announcement from his RA. If Tabule did not adequately notify him, his RA would have to just directly email him instead, which would result in the same number of emails in his inbox.