Receipts, Delivery

Where can I find em client delivery receipt? - or does it just not work well.

Just be aware that many servers do not send delivery receipts.

Have you addressed delivery receipts in the eM Client settings?
Are you sure the receiver of the email has not turned off delivery receipts in their email app as I have done?

No, this was a single message request from the right side of the tool bar.

Not sure about the receiver, but I see other people have tested this using other clients and received a response.