On 2014-02-21 03:41, Feel Zhou wrote:
-A INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT
it might be geoip blocking you see to the recipient mailservers if you not see it to all recipient ips
if that is it, then you can just remove recipient domain from dns with bind9 rpz zone
until recipient domains begins to learn :=)