When a Undelivered Mail message arrives in our Groupwise system it disappears somewhere in the dark, and is not delivered to the user.
The only thing we notice is that the "From" field is empty but all other fields are filled with correct data.

Answer from our ISP :

"E-mail that is being bounced back should have an empty (null) return
address so that bounces are never created for a bounce and therefore you
can't get messages bouncing back and forth forever."

Non delivery report - Wikipedia, the free encyclopedia
Bounce Address Tag Validation - Wikipedia, the free encyclopedia

Are we missing a setting somewhere ??

Jan Hoetink
Isendoorn College
The Netherlands