帮忙看下，iptables的配置，谢谢。
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#
# Sample iptables rules. It should be localted at:
#   /etc/sysconfig/iptables
#
# Shipped within iRedMail project:
"/etc/sysconfig/iptables" 69L, 1956C
#---------------------------------------------------------------------
# This file is part of iRedMail, which is an open source mail server
# solution for Red Hat(R) Enterprise Linux, CentOS, Debian and Ubuntu.
#
# iRedMail is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# iRedMail is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with iRedMail.  If not, see <http://www.gnu.org/licenses/>.
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#
# Sample iptables rules. It should be localted at:
#   /etc/sysconfig/iptables
#
# Shipped within iRedMail project:
#   * http://iRedMail.googlecode.com/
#

*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]

# Keep state.
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# Loop device.
-A INPUT -i lo -j ACCEPT

# http, https
-A INPUT -p tcp --dport 80 -j ACCEPT
-A INPUT -p tcp --dport 443 -j ACCEPT

# smtp, submission
-A INPUT -p tcp --dport 25 -j ACCEPT
-A INPUT -p tcp --dport 587 -j ACCEPT

# pop3, pop3s
-A INPUT -p tcp --dport 110 -j ACCEPT
-A INPUT -p tcp --dport 995 -j ACCEPT

# imap, imaps
-A INPUT -p tcp --dport 143 -j ACCEPT
-A INPUT -p tcp --dport 993 -j ACCEPT

# ssh
-A INPUT -p tcp --dport 22 -j ACCEPT

# Allow PING from remote hosts.
-A INPUT -p icmp --icmp-type echo-request -j ACCEPT

# ejabberd
#-A INPUT -p tcp -m multiport --dport 5222,5223,5280 -j ACCEPT

# ldap/ldaps
#-A INPUT -p tcp -m multiport --dport 389,636 -j ACCEPT

现在使用Foxmail或Outlook时，又提示接收密码错误，一直跳出来让我输入密码，我确认密码是正确的，用户名使用带域或不带域的都试过。/var/log/dovecot.log 日志如下：

[root@mail ~]# tail -f /var/log/dovecot.log
Nov 29 04:17:25 imap(ye@digiocto.tk): Info: Disconnected: Logged out bytes=312/1650
Nov 29 04:20:58 pop3-login: Info: Disconnected: Inactivity (no auth attempts): rip=58.211.157.66, lip=58.211.157.70
Nov 29 04:45:47 auth-worker: Info: mysql(127.0.0.1): Connected to database vmail
Nov 29 04:45:47 dict: Info: mysql(127.0.0.1): Connected to database vmail
Nov 29 21:56:59 pop3-login: Info: Aborted login (tried to use disabled plaintext auth): rip=58.211.157.66, lip=58.211.157.70
Nov 29 21:57:10 pop3-login: Info: Aborted login (tried to use disabled plaintext auth): rip=58.211.157.66, lip=58.211.157.70
Nov 29 21:57:16 pop3-login: Info: Aborted login (tried to use disabled plaintext auth): rip=58.211.157.66, lip=58.211.157.70
Nov 29 21:57:27 pop3-login: Info: Aborted login (tried to use disabled plaintext auth): rip=58.211.157.66, lip=58.211.157.70
Nov 29 21:57:32 pop3-login: Info: Aborted login (tried to use disabled plaintext auth): rip=58.211.157.66, lip=58.211.157.70
Nov 29 22:00:32 pop3-login: Info: Disconnected: Inactivity (tried to use disabled plaintext auth): rip=58.211.157.66, lip=58.211.157.70