Undelivered Mail Returned to Sender

[postmaster-noreply at playnet.it]

This is the mail system at host smtpsrv.playnet.it.

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 contact Playnet Helpdesk Support.

If you do so, please include this problem report. You can
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                   The mail system

<spbieffe at tin.it>: host smtp.tin.it[62.211.72.32] said: 550 RCPT
    TO:<spbieffe at tin.it> User unknown (in reply to RCPT TO command)
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Subject: Ordine No38781.
Date: Tue, 10 Apr 2012 19:26:16 +0200
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