This is the Postfix program at host avas1.avas.msg.nordnet.fr.
I'm sorry to have to inform you that your message could not be
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
<cdion(a)nordnet.fr> (expanded from <dworkin(a)nordnet.fr>): host
10.102.2.4[10.102.2.4] said: 550 <cdion(a)nordnet.fr>: Recipient address
rejected: User unknown in virtual mailbox table (in reply to RCPT TO
command)