does receipent read my emails ?

i have account in gmail and send mails to a person. i want to know if the receipent reads my mails or not. is it possible to find out ?
Answer #1
Nope
Answer #2
I think Gmail has no feature like this.
All gmail can tell is that the mail was passed off to the recipient’s server. If you didn’t get a bounce message back, then that is the case.
Even if the recipient was using gmail, you wouldn’t be able to get any more information without a subpoena, because it would a violation of the recipient’s privacy.
In general, email is not a reliable delivery channel. You should always ask the recipient to explicitly confirm reception of anything important.
Answer #3
It’s possible but not directly,You’d have to use GMAIL via IMAP or POP3
using Thunderbird,Refer to this article:
http://kb.mozillazine.org/Figuring_out_whether_the_recipient_read_your_message
Do note that the user has to consent to notifying you he read the email
and also some clients/web based emails don’t support this feature so it’s not 100%.
Answer #4
This will do what you want, but NOT with gmail. You must use your POP email.
http://www.msgtag.com/Email_Notify_.html
Edit, I think it will work with gmail.