Analizando cabecera de email para evitar confirmacion de lectura

Les envio el encabezado completo de un mail que me llegó y que generó un
acuse de recibo automatico sin mi consentimiento cuando lo lei desde el
correo web de hotmail .
En este sentido, podrian decirme que sistema, metodo, servicio o aplicacion
utilizó el emisor para generar automaticamente un acuse de recibo ?
Mil gracias.



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