--- a/make-tld-conf.py	Fri Jan 05 17:28:46 2018 -0800
+++ b/make-tld-conf.py	Mon Feb 19 15:25:40 2018 -0800
@@ -36,7 +36,10 @@
                 if not rc: prefix = '// no ns record for '
         f.write('%s%s\n' % (prefix, x))
 f.write('\n')
-f.write('// enable rdns as a tld, so *.reverse.softlayer.com is effective in the rpz zone\n')
-f.write('reverse.softlayer.com\n')
-f.write('sl-reverse.com\n')
+
+c="grep '^\*.*multi.surbl' /etc/cron.daily/rpz | awk '{print $1}' | cut -c3- | sed -e 's/.multi.surbl.org//g'"
+content = cmd(c)
+for x in content.split('\n'):
+    f.write(x + '\n')
+
 f.close()