How do I get the person receiving my email to acknowledge receiving my email?

There are emails I send to a person it is important that he/she


acknowledges receiving my email.
How do I get the person receiving my email to acknowledge receiving my email?
When I used to use Outlook I had the option of saying yes or no to whether I wanted to send the receipt or not. Is calling them an option instead of waiting for the e-mail receipt?
Reply:It depends on the e-mail you are using if you are using Microsoft outlook then there is a setting that say send reciept which means in order for the person to open tha e-mail it will automatically send you a e-mail back saying that so and so has read your message but as for yahoo or anyothers im not for sure but you should be able to somehow
baby boy names