diff --git a/HowtoMail/Antispam.md b/HowtoMail/Antispam.md
index a2eb0ae6..7da7256d 100644
--- a/HowtoMail/Antispam.md
+++ b/HowtoMail/Antispam.md
@@ -209,7 +209,7 @@ postscreen_greet_banner = Welcome! Are you a zombie?
 # RBL
 # If score >=2, reject with 550
 postscreen_dnsbl_threshold = 10
-postscreen_dnsbl_sites = zen.spamhaus.org*9,
+postscreen_dnsbl_sites = zen.spamhaus.org=127.0.0.[2..255]*9,
     bl.spamcop.net*9,
     b.barracudacentral.org*8,
     cbl.abuseat.org*8,