Outlook actually allows you to request two types of receipts: read receipts and delivery receipts. This feature needs to be configured before you can use it for your emails. A read receipt in Outlook lets you know if someone has opened an email you sent. If you are using Outlook as your email client, there is actually a feature that can help you deal with situations like the one above. You are completely in the dark until the recipient decides to send you a reply and reply to your letter. However, when it comes to email, you don’t get notified if someone actually read your email. When you call someone and they don’t answer, at least you know they didn’t answer.