新搭建的POSTFIX服务器，但是发信的时候老有警告信息

Question

新搭建的POSTFIX服务器，但是发信的时候老有警告信息，请问是为什么?

Jan  5 11:16:35 localhost dovecot: pop3-login: Login: user=<yuboma>, method=PLAIN, rip=192.168.200.194, lip=192.168.200.30, mpid=2109, secured
Jan  5 11:16:35 localhost dovecot: pop3(yuboma): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
Jan  5 17:36:16 localhost postfix/smtpd[2286]: warning: 192.168.200.194: hostname bogon verification failed: Name or service not known
Jan  5 17:36:16 localhost postfix/smtpd[2286]: connect from unknown[192.168.200.194]
Jan  5 17:36:17 localhost postfix/smtpd[2286]: 3357F1208B5: client=unknown[192.168.200.194], sasl_method=LOGIN, sasl_username=yuboma@''

Answer 1

http://www.zimbra.com/forums/installation/27291-solved-error-log-name-service-not-known.html

http://phorum.study-area.org/index.php/topic,54423.0.html