VPS啦Disable all the mail protocol by iptables:
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
save the iptables:
iptables-save service iptables save
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