More checks in lua plugins.

src/plugins/lua/once_received.lua

@@ -28,10 +28,12 @@ function check_quantity_received (task)
 			for _,h in ipairs(bad_hosts) do
 				if string.find(hn, h) then
 					-- Check for good hostname
-					for _,gh in ipairs(good_hosts) do
-						if string.find(hn, gh) then
-							i = false
-							break
+					if good_hosts then
+						for _,gh in ipairs(good_hosts) do
+							if string.find(hn, gh) then
+								i = false
+								break
+							end
 						end
 					end
 					if i then

src/plugins/lua/received_rbl.lua

@@ -22,9 +22,11 @@ function received_cb (task)
     for _,rh in ipairs(recvh) do
 		if rh['real_ip'] then
 			local _,_,o1,o2,o3,o4 = string.find(rh['real_ip'], '^(%d+)%.(%d+)%.(%d+)%.(%d+)$')
-			for _,rbl in ipairs(rbls) do
-				rbl_str = o4 .. '.' .. o3 .. '.' .. o2 .. '.' .. o1 .. '.' .. rbl['rbl']
-				task:resolve_dns_a(rbl_str, 'dns_cb', rbl['symbol'])
+			if o1 and o2 and o3 and o4 then
+				for _,rbl in ipairs(rbls) do
+					rbl_str = o4 .. '.' .. o3 .. '.' .. o2 .. '.' .. o1 .. '.' .. rbl['rbl']
+					task:resolve_dns_a(rbl_str, 'dns_cb', rbl['symbol'])
+				end
 			end
         end
     end