Is there a way to tell if someone whom you sent an e-mail has read it?

Answer 1

Not through the web-mail. If you use Outlook for mail, go to options and select Request Read receipt. You may get nothing if receipient web mail strips the reply.

Answer 2

There should be an option in your email program called "Request Delivery Receipt" or "Read Receipt" - something like that. Turn that on and send the email. However, many people block those and they have the option to allow a receipt to be sent to you, so they don't always work. It's really up to the person you're sending it to.

Answer 3

You can request a "receipt" in your email client, which will inform you if someone has read the email...