Maybe this is straightforward but I cant find it.
Currently when a message cannot be delivered due to a temporary error
(quota exceeded for example), it remains in the queue and the sender
receives a notification of the error.
Every time the system retries to deliver the message, if the problem
remains, the sender will receive again the same notification. Can this
behaviour be changed? I would like to keep my retry configuration but
notify the sender only once (the first time the message cannot be
delivered correctly)
