We have setup our subscription to use notify_url but not all incoming MMS are logging on the notify_url address we've set.
Sometimes when MMS is received it will trigger the notify_url thrice. So it's either not posting or posting it more than once. This only happens when we receive MMS, receiving SMS only posting it once.
What do we need to do to make sure all inbound SMS/MMS are triggering the webhook so we can capture all the data? If it fails to trigger the webhook (notify_url) does it store somewhere else that we can access to capture the data?