Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host etsv005m.eni.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 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 mail system

<allegro@polimerieuropa.com>: host pemiaspm.polimerieuropa.com[172.17.138.244]
    said: 550 Mailbox unavailable or access denied -
    <allegro@polimerieuropa.com> (in reply to RCPT TO command)
-------------- parte successiva --------------
Un messaggio incapsulato è stato rimosso...
Da:         tp@lists.linux.it
Oggetto :   error
Data:       Mon, 10 Sep 2012 15:32:11 -0700
Dimensione: 40487
URL:        <http://lists.linux.it/pipermail/tp/attachments/20120911/ac08b1c7/attachment-0001.mht>