This is the Postfix program at host P3-500.open-3d-constructions.org.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to <postmaster>
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The Postfix program
<damm@localhost.open-3d-constructions.org> (expanded from <damm@localhost>):
cannot update mailbox /var/mail/damm for user damm. cannot open file:
Permission denied
Final-Recipient: rfc822; damm@localhost.open-3d-constructions.org
Original-Recipient: rfc822;damm@localhost
Action: failed
Status: 5.2.0
Diagnostic-Code: X-Postfix; cannot update mailbox /var/mail/damm for user damm.
cannot open file: Permission denied