This is the Postfix program at host mta-fe.casema.nl.
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
<[email protected]>: host mail2.utassault.net[213.232.94.72] said: 550
<[email protected]>: Recipient address rejected: User unknown in virtual
mailbox table (in reply to RCPT TO command)