como posso resolver isso ??
Dec 12 23:52:14 gama postfix/smtpd[18394]: warning: 200.159.38.58: hostname relay1.visaweb.com.br verification failed: Name or service not known
Dec 12 23:52:14 gama postfix/smtpd[18394]: connect from unknown[200.159.38.58]
Dec 12 23:52:14 gama postfix/smtpd[18394]: NOQUEUE: reject: RCPT from unknown[200.159.38.58]: 450 4.7.1 <mailx.visaweb.com.br>: Helo command rejected: Host not found; from=<[email protected]> to=<[email protected]> proto=SMTP helo=<mailx.visaweb.com.br>
Dec 12 23:52:14 gama postfix/smtpd[18394]: too many errors after RCPT from unknown[200.159.38.58]
Dec 12 23:52:14 gama postfix/smtpd[18394]: disconnect from unknown[200.159.38.58]