This pidgin-plugin implements xmpp message delivery receipts (XEP-0184 v1.2).
When no delivering confirmation is displayed, it is also possible that the receiver doesn't support the extension.
To compile the plugin, run
$ make
You will need pidgin development packages (link in ubuntu: libpurple-dev and pidgin-dev).
To copy the extension to your personal plugin folder (~/.purple/plugins) run:
$ make install
Now you may activate the extension within the pidgin settings.