argos/dmp-frontend/src/app/core/common/enum/notification-tracking-state.ts

export enum NotificationTrackingState {
	UNDEFINED = 0,
	NA = 1,
    QUEUED = 2,
    SENT = 3,
    DELIVERED = 4,
    UNDELIVERED = 5,
    FAILED = 6,
    UNSENT = 7
}