Requesting a return receipt doesn’t necessarily mean one will actually be received. The return receipt option is offered by some email service providers. With the large number of email service providers available, the best way to find out which ones have a return receipt option is to contact the service and ask.
It may also provide additional information of value, such as the time and date the email was read, and the IP (Internet Protocol) address of the local computer or network that received it. For one thing, it serves as confirmation of delivery.
Just as with physical “snail mail,” using this feature can be very useful. The return receipt option is a feature offered by some email service providers.