Unimatrix delivery-report (DLR) callback
Webhooks
Unimatrix delivery-report (DLR) callback
Records a vendor delivery receipt (channel, status, masked destination) into the audit trail. Authenticated by the configured signature and/or ?token=; 200 on accept, 401 on a bad token/signature, 503 when disabled.
POST
Unimatrix delivery-report (DLR) callback

