Notification delivery report problem

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    Nikolai Polkhovskiy

    Hi!

    Does it means that PW service was able to deliver the message to google messaging infrastructure, or that google confirmed that the message was delivered to the device?

    It means that the message was successfully delivered to the gateway (GCM). After that there are no guarantees of the delivery to the actual user, because GCM can't guarantee that as well.

    a not negligible numbers of "success" notifications are not really delivered to the users

    As I've mentioned above, the "Success" response means that we've delivered the message to the gateway. After that it's GCM who are responsible for the further delivery.

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