"Did you just delete all your events today?" she asked.
"Don't delete it," he told her.
This is a way that you can do anything from control the commands of your computer (ask it to open documents, delete files, navigate through a webpage, etc.) to write essays, emails, and applications with a hands-free mode.
If you delete your mailbox your Sim doesn't have an address meaning they can't go to work, can't go to any of the expansion lots and won't be able to invite friends over.