Dear all,

I got error "authentication failed: Connection lost to authentication server", 
i turned on debug mode in Postfix/Dovecot, but this is the error i can get.

All other errors point to sasl auth failure, what does "connection lost to 
authentication server" means? How can i exactly know what the problem is and 
how to fix it?

Here's my Dovecot/Postfix configuration, with Active Directory integration.

- dovecot.conf: http://pastebin.com/7T05kvmH
- dovecot-ldap.conf: http://pastebin.com/DtkAg01v
- Postfix main.cf: http://pastebin.com/Z9Wihmvr

Dovecot/Postfix and AD are running in the same network (192.168.10.X), no 
firewall between them.

Thanks for your help. :)

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