[Trhm-Go] Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host filtrobck01.colt-engine.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

<b3c42245e at pspingegneria.it>: host 10.0.10.195[10.0.10.195] said: 550 Requested
    action not taken: mailbox unavailable or not local (in reply to RCPT TO
    command)
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