problem with qmail bounce???

[palitus]

Hello!

Since several months I receive of my plesk 7.1.5 bounce mails with the following format:

Return-Path: <>
Delivered-To: [email protected]
Received: (qmail 14623 invoked for bounce); 30 Aug 2006 14:08:52 -0000
Date: 30 Aug 2006 14:08:52 -0000
From: [email protected]
To: [email protected]
Subject: failure notice
X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on sabico.com
X-Spam-Level: ***
X-Spam-Status: No, hits=3.2 required=4.0 tests=HTML_50_60,HTML_MESSAGE,
HTML_TITLE_EMPTY,NORMAL_HTTP_TO_IP,NO_REAL_NAME,WEIRD_PORT
autolearn=no version=2.63

Hi. This is the qmail-send program at sabico.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<[email protected]>:
207.97.245.101 does not like recipient.
Remote host said: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in relay recipient table
Giving up on 207.97.245.101.

<[email protected]>:
207.97.245.101 does not like recipient.
Remote host said: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in relay recipient table
Giving up on 207.97.245.101.

<[email protected]>:
207.97.245.101 does not like recipient.
Remote host said: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in relay recipient table
Giving up on 207.97.245.101.

<[email protected]>:
207.97.245.101 does not like recipient.
Remote host said: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in relay recipient table
Giving up on 207.97.245.101.

--- Below this line is a copy of the message.

[And here the sended message]