Undelivered Mail Returned to Sender

This is the mail system at host ls265.t-com.hr.

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

<prigovori@t-com.hr>: host 127.0.0.1[127.0.0.1] said: 550 5.1.1
    <prigovori@t-com.hr>: Recipient address rejected: User unknown in virtual
    alias table (in reply to RCPT TO command)

X-Envelope-Sender: miroslav.rovis1@zg.ht.hr

Received: from g0n.localdomain (93-136-12-179.adsl.net.t-com.hr [93.136.12.179])
    by ls265.t-com.hr (Qmali) with ESMTP id 3E08820B0259;
    Thu, 23 Apr 2015 20:41:53 +0200 (CEST)
Received: by g0n.localdomain (Postfix, from userid 1000)
    id 7CD5038006B; Thu, 23 Apr 2015 20:33:45 +0200 (CEST)
Date: Thu, 23 Apr 2015 20:33:45 +0200
From: miroslav.rovis1@zg.ht.hr
To: prigovori@t-com.hr
Subject: Re: Upozorenje T-Com administratora
Message-ID: <20150423183344.GC4576@g0n>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha512;
    protocol="application/pgp-signature"; boundary="dCSxeJc5W8HZXZrD"
Content-Disposition: inline
In-Reply-To: <201501071514.t07FEl0h016593@ls239.t-com.hr>
User-Agent: Mutt/1.5.23 (2014-03-12)
X-Mutt-Fcc: =Sent