Ubuntu 16.04
iredmail0.9.7
LDAP
测试
iredmail集成包安装在1.113成功正常   roundcube可以正常登录！

我正式部署想把webmal 安装在另外一台服务器上  在DMZ区域 供外网直接访问

roundcube 单独安装在一个1.117上的服务器  配置后  imap无法登录成功
Connecting to 192.168.1.113...
IMAP connect:  NOT OK(Login failed for wei.chen@moderndentalchina.com from 192.168.8.23. Login disabled by IMAP server)

在1.113上的日志
/var/log/dovecot$ cat imap.log 
Feb 27 20:55:12 mailtest dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=192.168.1.117, lip=192.168.1.113, session=<MdgkIzFmjJjAqAF1>
Feb 27 20:55:40 mailtest dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=192.168.1.117, lip=192.168.1.113, session=<qsfIJDFmjpjAqAF1>
Feb 27 20:58:17 mailtest dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=192.168.1.117, lip=192.168.1.113, session=<rpIrLjFmkJjAqAF1>