==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：iredmail-0.6.1
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）:OpenLDAP
- 使用的 Linux/BSD 发行版名称及版本号：Ubuntu 10.04.1 LTS \n \l

- 与您的问题相关的日志信息：

重启dovecot服务及查看日志文件显示如下：

root@mail:/etc# /etc/init.d/dovecot restart
* Restarting IMAP/POP3 mail server dovecot                                                                                                                                                              ILoading modules from directory: /usr/lib/dovecot/modules/imap
IModule loaded: /usr/lib/dovecot/modules/imap/lib10_quota_plugin.so
IModule loaded: /usr/lib/dovecot/modules/imap/lib11_imap_quota_plugin.so
IModule loaded: /usr/lib/dovecot/modules/imap/lib20_zlib_plugin.so
IEffective uid=65534, gid=65534, home=/tmp
IQuota root: name= backend=maildir args=
IQuota rule: root= mailbox=* bytes=104857600 messages=0
IQuota warning: bytes=89128960 (85%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 85
IQuota warning: bytes=94371840 (90%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 90
IQuota warning: bytes=99614720 (95%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 95
IEffective uid=65534, gid=65534, home=/tmp
                                                                                                                                                                                                  [ OK ]
root@mail:/etc# tail /var/log/dovecot.log
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: Effective uid=1001, gid=1001, home=/var/vmail
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: Quota root: name= backend=maildir args=
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: Quota rule: root= mailbox=* bytes=1073741824 messages=0
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: Quota warning: bytes=912680550 (85%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 85
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: Quota warning: bytes=966367641 (90%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 90
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: Quota warning: bytes=1020054732 (95%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 95
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: maildir: data=~/vmail1/cynovo.com.cn/r/rx/rxi/rxie-2010.12.02.15.00.52//Maildir/
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: maildir++: root=/var/vmail/vmail1/cynovo.com.cn/r/rx/rxi/rxie-2010.12.02.15.00.52//Maildir, index=, control=, inbox=/var/vmail/vmail1/cynovo.com.cn/r/rx/rxi/rxie-2010.12.02.15.00.52//Maildir
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: Namespace : Using permissions from /var/vmail/vmail1/cynovo.com.cn/r/rx/rxi/rxie-2010.12.02.15.00.52//Maildir: mode=0777 gid=-1
Jul 14 13:21:01 POP3(rxie@cynovo.com.cn): Info: Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
请问问题出在哪里，从哪里着手解决，谢谢！