The recepient has to acknowledge the delivery receipt, perhaps they are not,
or the receipt is being blocked at their end.
Ask them if they are getting the request.

"NeedHelp" wrote in message
...
My delivery receipt used to work and now even though it is checked i do
not
know if the person had the e-mail delivered to their computer. My read
receipt is checked and it works under tracking options. What can I do