版本：iRedMail-0.8.4
系统：Centos 6.4

日志：
May 08 09:22:19 master: Warning: Killed with signal 15 (by pid=2511 uid=0 code=kill)
May 08 09:22:20 master: Info: Dovecot v2.0.18 starting up (core dumps disabled)
May 08 09:23:41 auth: Error: LDAP: binding failed (dn cn=mailauth,dc=oa,dc=com): Invalid credentials, 80090308: LdapErr: DSID-0C0903A9, comment: AcceptSecurityContext error, data 52e, v1db1
May 08 09:23:53 auth: Error: LDAP: binding failed (dn cn=mailauth,dc=oa,dc=com): Invalid credentials, 80090308: LdapErr: DSID-0C0903A9, comment: AcceptSecurityContext error, data 52e, v1db1
May 08 09:24:03 imap-login: Info: Disconnected (auth failed, 1 attempts): user=<zhengxl@oa.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured

重启dovecot后，使用
[root@mail dovecot]# telnet localhost 143
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
. login mailauth@oa.com password
. NO [UNAVAILABLE] Temporary authentication failure.

出现上面的日志。

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