1. I'm in this for money, not love. That means you can have the purest heart under the sun, and not want a single dime for your work, but I'm not going to work with you if you want to give it away.
Telling me you're willing to give away your work in order to get published is not persuasive. Don't include it in a query letter.
2. Sending a CD of your work in the mail ensures two things: I will throw it away unopened and you will have wasted your postage and CD cost.
3. Sending an email with a reading receipt annoys the snot out of the query readers here. They click cancel, or ignore or whatever gets the thing off the screen fastest. There is NO correalation between what the receipt says in terms of time read or opened and when those things, IF those things, actually occured. I understand why you want to use them. Don't.