请教postfix测试时出现的错误提示。（做了很久没搞出来，）

大家好：
我邮件服务器在freebsd用
telnet localhost 25 测试的时候出现这个错误。
我把整个过程写出来。

#telnet localhost 25

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 mail.openkaku.jp ESMTP Postfix
ehlo mail
250-mail.xxxxxx.com
250-PIPELINING
250-SIZE 20480000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
auth login
334 VXNlcm5hbWU6
dGVzdEB0ZXN0LmNvbQ==
334 UGFzc3dvcmQ6
MDAwMDAw
535 5.7.0 Error: authentication failed: authentication failure
Connection closed by foreign host.

请问这个是什么原因。。一直在线等待。。

着急。。。。


tail -f maillog

ug 11 22:44:54 www MailScanner[53271]: Using SpamAssassin results cache
Aug 11 22:44:54 www MailScanner[53271]: Connected to SpamAssassin cache database
Aug 11 22:44:54 www MailScanner[53271]: Enabling SpamAssassin auto-whitelist functionality...
Aug 11 22:44:58 www MailScanner[53272]: MailScanner E-Mail Virus Scanner version 4.61.7 starting...
Aug 11 22:44:58 www MailScanner[53272]: Read 777 hostnames from the phishing whitelist
Aug 11 22:44:58 www MailScanner[53272]: SpamAssassin temporary working directory is /var/spool/MailScanner/incoming/SpamAssassin-Temp
Aug 11 22:44:59 www MailScanner[53272]: Using SpamAssassin results cache
Aug 11 22:44:59 www MailScanner[53272]: Connected to SpamAssassin cache database
Aug 11 22:44:59 www MailScanner[53272]: Enabling SpamAssassin auto-whitelist functionality...
Aug 11 22:45:03 www MailScanner[53276]: MailScanner E-Mail Virus Scanner version 4.61.7 starting...
Aug 11 22:45:03 www MailScanner[53276]: Read 777 hostnames from the phishing whitelist
Aug 11 22:45:03 www MailScanner[53276]: SpamAssassin temporary working directory is /var/spool/MailScanner/incoming/SpamAssassin-Temp




# tail -f /var/log/auth.log
Aug 11 23:45:06 www last message repeated 2 times
Aug 11 23:50:19 www postfix/smtpd[1310]: sql plugin: no result found
Aug 11 23:50:19 www postfix/smtpd[1310]: sql plugin: no result found
Aug 12 00:07:04 www postfix/smtpd[1633]: sql plugin: no result found
Aug 12 00:07:04 www postfix/smtpd[1633]: sql plugin: no result found
Aug 12 00:14:48 www postfix/smtpd[1788]: sql plugin: no result found
Aug 12 00:14:48 www postfix/smtpd[1788]: sql plugin: no result found
Aug 12 00:20:33 www sasldblistusers2: sql_select option missing
Aug 12 00:20:33 www sasldblistusers2: auxpropfunc error no mechanism available
Aug 12 01:03:35 www sshd[17732]: Did not receive identification string from 81.169.165.154


请大家帮我分析一下。。。非常感谢