Question : Exchange 2007 - blocking distr. list email

I have just blocked emails from being sent to a large distribution list. Supervisors wanted people to get an email sent back that their email has been blocked and to see their supervisor to get the email sent. Supervisors are authourized to send email to this distribution list.

The problem is that the one email they get back is very large and lists each person on the list with the returned message to see their supervisor after each email address in the list.

Is it possible to have the email sent back with one notice simply saying you can't send to the list and to see the supervisor.

Answer : Exchange 2007 - blocking distr. list email

From my testing I don't think you are going to fix this. It is either one or the other.
It is due to the way the distribution list is expanded. If you block on the group then it stops it at the expansion point on the originating server. Blocking it at the transport layer means the list has already been expanded and consequently you get an NDR for each message.

Simon.