Let’s suppose some admin want to turn off NRN(Not-read Notification) outside their org.
I would like to introduct one workaround for this.
First of all , we need to check below header concept.
When an Exchange 2000 Server or an Exchange Server 2003 recipient sends a message that contains a read receipt request to a recipient hosted on an Exchange Server 5.5 computer, the Exchange 2000 Server computer or the Exchange Server 2003 computer formats the read receipt as Disposition-Notification-To , which Exchange Server 5.5 cannot interpret.
I applied to above concept in Transport rules
OK, see below scenario.
External domain ----Read Receipt message-> Exchange 2007 domain.
I don’t want to send NRN to External domain when deleting that message with above property from external domain
I made below rule in exchange 2007.