--- a/check_rbl/src/check_rbl.ini
+++ b/check_rbl/src/check_rbl.ini
@@ -32,7 +32,7 @@
 server=blacklist.sci.kun.nl
 server=bl.technovision.dk
 server=dnsbl.kempt.net
-server=dul.ru
+;server=dul.ru ; domain seems abandoned
 server=forbidden.icm.edu.pl
 server=hil.habeas.com
 server=rbl.schulte.org
