From a lang-8 post:
Once the necessary documents have been received, your account will be activated and you will be informed of that by email.
I've recommented to change the pronoun that to this. But why exactly? This signals greater proximity relative to that, and sometimes emotional proximity, according to this answer.
Is the 'emotional distancing' conveyed by that the main obstacle? Or is it also technically wrong to use that in "you will be informed of __ by email"? Are there instances where we can use that in this phrase and be sure that it sounds natural?