Chybove hlasenie (failure notice)

[MAILER-DAEMON]

Ahoj, som postovy program serveru ns1.slovanet.net.
Zial nepodarilo sa mi dorucit spravu na nasledujucu adresu.

(Hi. This is the qmail-send program at ns1.slovanet.net.)
(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.)

<address@hidden>:
195.80.171.18 does not like recipient.
Remote host said: 550 5.1.1 <address@hidden>... User unknown
Giving up on 195.80.171.18.

--- Prilozene su hlavicky z povodnej zpravy (Enclosed are the original headers 
of the message).
> --- Begin Message ---
> (Body supressed)
>
> --- End Message ---