This is the Postfix program at host deliver2.completel.net.

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

<alsa@digigram.com>: host mail.digigram.com[213.30.172.230] said: 550
    <alsa@digigram.com>: Recipient address rejected: User unknown in relay
    recipient table (in reply to RCPT TO command)