how to see if an e-mail I have sent somone has been opened

[offshore2]

I would like to know how to see if an e-mail I have sent somone, has been opened.

 

[EQ Admin]

Hello,

Very few email services have an email tracking feature.

You can try configuring your email program to request delivery and read receipts.

Which email program do you use?

to Email Questions!

 

[offshore2]

I am with AT&T Yahoo. I was told, their is away to see if a sent e-mail was opened, that wasn't obbvious to the person who received it. I have e-mailed this person before, and on occasion he says he "never received it". I am trying to get answers to very important questions, and I would like written answers. Thank you.