iptables屏蔽常规邮件端口
iptables -A INPUT -p tcp -m multiport --dport 25,110,465:587,993:995 -j DROP iptables -A INPUT -p udp -m multiport --dport 25,110,465:587,993:995 -j DROP iptables -A OUTPUT -p tcp -m multiport --dport 25,110,465:587,993:995 -j DROP iptables -A OUTPUT -p udp -m multiport --dport 25,110,465:587,993:995 -j DROP /etc/init.d/iptables save