warn: spamd: unauthorized connection

after adding IPTables rule
-A POSTROUTING -d ! 10.10.64.0/255.255.255.0 -j SNAT --to-source 10.10.64.105

I get this error on spamd log
warn: spamd: unauthorized connection from 10.10.64.105 [10.10.64.105] at port 36532 at /usr/bin/spamd line 1033

look at google.com got this link
http://spamassassin.apache.org/full/3.2.x/doc/spamd.html

add option -A on /var/qmail/supervise/spamd/run
from: exec /usr/bin/spamd -x -u vpopmail -s stderr 2>&1
into: exec /usr/bin/spamd -A 10.10.64. -x -u vpopmail -s stderr 2>&1

restart spamd
#qmail-spam restart

info: spamd only allow access from localhost with port 783