"Inbound Sender controls" SMTP parameter prevents a non-distribution message from being delivered, because "MAIL FROM" is blank

Helo everybody,

If one of our user send a SMTP message to a person who doesn’t exist in a external domain, a non-distribution SMTP message should be sent to him.

In fact, a non-delivery message is created, and the problem is that the “MAIL FROM” field is only : < >.

Because the “MAIL FROM” field is blank, the non-distribution message can’t enter our internal domain, because we have defined a list of authorized senders in the “inbound sender controls” SMTP parameter : Configuration settings => Router/SMTP => Restrictions and controls => SMTP Inbound controls => Inbound Sender Controls => Allow messages only from the following external internet addresses/domain.

The result is that our user can’t receive the non-distribution message because this one is rejected :

“mail from rejected for policy reason, sender is denied in your configuration”.

Has somebody a tip ?

Is it possible to configure Notes in order to change the “MAIL FROM: < >” field in “MAIL FROM:<postmaster@…>” ?

Thank you very much !