Oki 5750 - Manual (Page 62)

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OKIFAX 5750/5950 52
12: DSN (Delivery Status Notification)
! MDN vs. DSN
MDN: you receive a confirmation that your message
was received by the destination mail server.
DSN: you receive a confirmation that your message was
opened by the person you sent it to (the recipient).
All systems involved in the communication must support
MDN and DSN.
When a mail server with DSN receives a message, it sends a
delivery confirmation to the sender of the message.
Change this setting to OFF, if you are sending a message to
a mail server that does not support DSN.
If you do not change this setting to OFF, the server may not
be able to handle the message correctly and a
communication error may occur.
Some servers can send mail to servers without DSN.
In this case, no delivery notification will be sent.
! User Function 86, TEXT PRINT must be ON for your
machine to receive and print delivery notifications.
! When User Function 93, Network Settings, DSN is ON,
your machine receives confirmations (MDN) from the
mail server of anyone sent a message by your machine.