If I want to block someone from emailing me. This would be done from a work computer. Who knows a person is blocked? Will the sender get a message saying they are blocked? Does my email notify me that email@example.com sent me a message and it was blocked? And where does it go–to the junk mail or just instantly deleted?
Depends on how you block the message and what e-mail client. Usually, you create a rule to deliver the message to your trash. You won’t see the message unless you look for it in your trash folder. The sender gets no notification no matter how you set it up. You could probably set things up so you get a notification, but why bother?
If and how you can block e-mail depends on your e-mail client and/or server. What e-mail program do you use?