求助--关于postfix的认证

show007good

我参照这里http://www.cnfug.org/journal/systems/2006/000118.html
配置基于FreeBSD和Postfix的邮件系统，但进行到“用户登录测试”就出现问题了。
showgood# telnet 127.0.0.1 25
Trying 127.0.0.1...
Connected to localhost.test.com.
Escape character is '^]'.
220 mail.toping.net ESMTP Postfix
ehlo mail
250-mail.toping.net
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250 8BITMIME
auth login
334 UGFzc3dvcmQ6
d2VibWFzdGVyQHRvcGluZy5uZXQ=webmaster@toping.net
501 Error: malformed authentication response

请问，出错的原因是什么，有什么办法可以解决，哪位高手可以帮帮手？

show007good

这是我的出错日志
showgood# tail /var/log/maillog
May 8 19:47:11 showgood postfix/smtpd[1398]: connect from localhost.test.com[12 7.0.0.1]
May 8 19:48:19 showgood postfix/smtpd[1398]: warning: localhost.test.com[127.0. 0.1]: SASL login authentication failed
May 8 19:48:29 showgood postfix/smtpd[1398]: lost connection after AUTH from lo calhost.test.com[127.0.0.1]
May 8 19:48:29 showgood postfix/smtpd[1398]: disconnect from localhost.test.com [127.0.0.1]
May 8 19:54:00 showgood authdaemond: stopping authdaemond children
May 8 21:42:09 showgood postfix/postfix-script: starting the Postfix mail syste m
May 8 21:42:10 showgood postfix/master[553]: daemon started -- version 2.2.10, configuration /usr/local/etc/postfix
May 8 21:42:11 showgood authdaemond: modules="authmysql", daemons=5
May 8 21:42:11 showgood authdaemond: Installing libauthmysql
May 8 21:42:12 showgood authdaemond: Installation complete: authmysql