AWS Pinpoint IOS alert notification send to VOIP Channel

Question

Hi,

We are sending alert and voip notifications to your user with SendUsersMessagesCommand API
A user is register with 2 Enpoints (one with ChannelType=APNS, another one with ChannelType=APNS_VOIP)
When we send a notification with apns-push-type=voip, the notification is send only to the endpoint with ChannelType=APNS_VOIP
When we send a notification with apns-push-type=alert, the notification is send to all endpoints (ChannelType APNS and APNS_VOIP)

Why push of type alert are send to both enpoints ?
Is there away to prevent this ?

JSON Payload:
{
    ApplicationId: "APPID",
    SendUsersMessageRequest: {
      Users: {
        "USERID": {},
      },
      MessageConfiguration: {
        APNSMessage: {
          TimeToLive: 86000,
          RawContent: `{"aps" : {"alert" : {"title" : "${title}","body" : "${description}" }}, "content-available": 0,"mutable-content":0, "apns-push-type" : "alert"}`,
        },
      },
    },

thanks for your help.

re:Post Agent · Answer

The behavior you're observing is related to how Amazon Pinpoint handles different push notification types and channels for iOS devices.

When you send a notification with 'apns-push-type=voip', it's specifically targeted for VoIP services, so Pinpoint correctly sends it only to the endpoint with ChannelType=APNS_VOIP. This is the expected behavior for VoIP notifications.

However, when you send a notification with 'apns-push-type=alert', it's considered a standard push notification. Pinpoint is designed to send standard push notifications to all valid iOS endpoints associated with the user, regardless of whether they are APNS or APNS_VOIP. This is because both channel types are capable of receiving and displaying alert notifications.

To prevent alert notifications from being sent to the APNS_VOIP endpoint, you have a few options:

1. Use separate user IDs for APNS and APNS_VOIP endpoints. This way, you can target specific users (and thus specific endpoint types) when sending messages.

2. If possible, modify your app to register only one endpoint type per device - either APNS or APNS_VOIP, depending on the primary purpose of your notifications.

3. Use the SendMessages API instead of SendUsersMessages. With SendMessages, you can specify exact endpoints to send to, giving you more control over which channels receive the notification.

4. If you need to use SendUsersMessages, you could potentially add custom attributes to your endpoints and use them in combination with user attributes to filter which endpoints receive the message.

Remember that the ability to receive standard push notifications on VoIP endpoints can be beneficial in some use cases, so consider carefully whether preventing this behavior aligns with your app's requirements.  
**Sources**  
[Amazon Pinpoint push notifications - Amazon Pinpoint](https://docs.aws.amazon.com/pinpoint/latest/userguide/channels-push.html)  
[APNs VoIP Channel - Amazon Pinpoint](https://docs.aws.amazon.com/pinpoint/latest/apireference/apps-application-id-channels-apns_voip.html)  
[APNs VoIP Sandbox Channel - Amazon Pinpoint](https://docs.aws.amazon.com/pinpoint/latest/apireference/apps-application-id-channels-apns_voip_sandbox.html)

AWS Pinpoint IOS alert notification send to VOIP Channel

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