Error postfix 554 5.7.1 Relay access denied

[theprincy]

Apr 11 13:49:32 london postfix/master[16366]: daemon started -- version 2.5.5, configuration /etc/postfix
Apr 11 13:49:42 london postfix/smtpd[16371]: connect from static.251.253.4.46.clients.your-server.de[46.4.253.251]
Apr 11 13:49:42 london postfix/smtpd[16371]: NOQUEUE: reject: RCPT from static.251.253.4.46.clients.your-server.de[46.4.253.251]: 554 5.7.1 <info@qualitaferrara.it>: Relay access denied; from=<info@powerpcweb.it> to=<info@qualitaferrara.it> proto=ESMTP helo=<madrid.bitrunners.com>
Apr 11 13:49:42 london postfix/smtpd[16371]: disconnect from static.251.253.4.46.clients.your-server.de[46.4.253.251]
Apr 11 13:49:54 london postfix/smtpd[16371]: connect from host-2-60-163-116.pppoe.omsknet.ru[2.60.163.116]
Apr 11 13:49:56 london postfix/smtpd[16375]: connect from server-46.45.137.227.as42926.net[46.45.137.227]
Apr 11 13:49:56 london postfix/smtpd[16371]: NOQUEUE: reject: RCPT from host-2-60-163-116.pppoe.omsknet.ru[2.60.163.116]: 554 5.7.1 <sabrina@sabrinadistefano.com>: Relay access denied; from=<pgyhwigjz@abqanimalalliance.org> to=<sabrina@sabrinadistefano.com> proto=SMTP helo=<abqanimalalliance.org>
Apr 11 13:49:56 london postfix/smtpd[16371]: lost connection after RCPT from host-2-60-163-116.pppoe.omsknet.ru[2.60.163.116]
Apr 11 13:49:56 london postfix/smtpd[16371]: disconnect from host-2-60-163-116.pppoe.omsknet.ru[2.60.163.116]
Apr 11 13:49:56 london postfix/smtpd[16375]: NOQUEUE: reject: RCPT from server-46.45.137.227.as42926.net[46.45.137.227]: 554 5.7.1 <3dsandromeloni@sandromeloni.it>: Relay access denied; from=<vefo@agtaweb.org> to=<3dsandromeloni@sandromeloni.it> proto=SMTP helo=<agtaweb.org>