errore invio e-mail

[Manson666]

Ho inviato una mail ad un indirizzo (sicuramente giusto perchè è di un sito web) ma mi torna indietro una mail con questo errore, come mai?:

Hi. This is the qmail-send program at supereva.it.
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]>:
69.46.18.186 does not like recipient.
Remote host said: 551 User not local; please try <forward-path>
Giving up on 69.46.18.186.

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

Return-Path: <[email protected]>
Received: (qmail 22705 invoked by uid 320); 30 Dec 2003 18:59:31 -0000
Date: 30 Dec 2003 18:59:31 -0000
Message-ID: <[email protected]>
Received: from 151.24.139.99 ([email protected]) by mail.supereva.it with HTTP; Tue Dec 30 19:59:31 2003
X-Originating-IP: [151.24.139.99]
From: [email protected]
Reply-To: [email protected]
To: [email protected]
X-Priority: 3
X-MSMail-Priority: Normal
Importance: Normal