Sure,
might say
Late message
We are trying to deliver your message, but we are currently unable to deliver it because:
and usually it is
1) destination box full
2) destination server is not responding
We will keep trying again, if we fail to deliver the message we will send you an additional notice
....
The problem is that notifying the administrator I don't know if it solves the problem. So what can the administrator do? Immediately generate the bounce to the sender?
I believe that it is important to let the sender know that the message is being delayed and what is the cause (which usually depends on the destination).
However, if you want to notify the administrator it would be one more thing.
However, I would like to point out that the logging system is not adequate.
If I see a blank message in the spool to see why I have to:
1) write down the number of the message
2) go to the logs
3) search by message number
I think it is absolutely useful to put a direct link from the spool that opens the log directly
Sabatino Traini
Chief Information Officer
Genial s.r.l.
Martinsicuro - Italy