[Mail] 新装的邮件服务器，测试pop3时出现的问题。

用源代码安装的postfix+Cyrus-sasl+courier-imap+courier-authlib.
现在telnet localhost 110时报错

Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
+OK Hello there.
user jrrr@zfdx.com
+OK Password required.
pass jrrr@zfdx.com
-ERR Temporary problem, please try again later
Connection closed by foreign host.

然后到maillog里查看错误信息显示：
Jul 12 18:37:07 localhost pop3d: Connection, ip=[200.200.200.27]
Jul 12 18:37:07 localhost pop3d: LOGIN FAILED, user=jrrr@zfdx.com, ip=[200.200.200.27]
Jul 12 18:37:07 localhost pop3d: authentication error: Input/output error

我判断应该是courier-authlib在验证的时候过不去吧？应该查看authmysqlrc这个文件里的配置么？还是说有别的问题，请大家帮助~