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Administrators can do that using the menu LDN Services. Creating a new Notify Service means to submit the following form (note: all :

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All fields, except 'Description', are required):
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Every LDN message is going to have a link referring to the stored notify service. At time of writing it is the LDN Inbox URL. If the incoming LDN message has the LDN inbox url URL equals to one of the stored Notify Service' ldn_url - , the LDN message is stored and queued as a trusted message, otherwise it’s flagged as untrusted.

Please note that service URLs are unique, and a service can't be registered if the service URL entered in the form matches the one of an already registered service.

For additional security, for each service a valid IP range must be set. When a LDN Notification is received, the extractor perform a check of the source IP against the provided IP range for the service. If the source IP is valid the LDN is queued as a trusted message, otherwise if the source IP is invalid it’s flagged as untrusted.

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