Maximum Retries
You can designate the number of times to attempt to deliver a message and the interval between each attempt. After the limit is reached, the message is returned to the sender with a non-delivery report (NDR) and copies of the message and NDR are sent to the designated location. The NDR is then placed in the Queue directory and goes through the same delivery process as a message. When the NDR reaches the maximum number of retry attempts, the NDR and message are sent to the Badmail directory.

In the Maximum Retries box, type a value for the number of deliveries that should be attempted before the message is returned to the sender with an NDR. The default is 48 attempts.