diff --git a/etc/exim4/exim4.conf b/etc/exim4/exim4.conf
index 7b3a3a9..4e1dc0c 100644
--- a/etc/exim4/exim4.conf
+++ b/etc/exim4/exim4.conf
@@ -608,17 +608,13 @@ acl_rcpt_to:
     condition = ${if >{$runrc}{6}{yes}{no}}
     log_message = Unexpected error in SPF check. spfquery returned $runrc
 
-  # check DNSbl(s) and if found add header for filtering to Junk
+  # check DNSBL(s) and if found add header for filtering to Junk
   accept
-##    condition   = ${if and { \
-##                    { ! def:header_X-DNS-Whitelist: } \
-##                    { eq {$header_X-Whitelist-Flag:}{YES}} \
-##                    } {yes}{no}}
-    condition = ${if !eq {$header_X-Whitelist-Flag:}{YES}}
-    dnslists    = zen.spamhaus.org
-    log_message = $sender_host_address is listed in $dnslist_domain ${if def:dnslist_text {($dnslist_text)}}
-    add_header  = X-DNS-Blacklist: $sender_host_address is listed in $dnslist_domain ${if def:dnslist_text {($dnslist_text)}}
-    add_header  = X-Junk-Flag: YES
+    !condition = ${if eq {$header_X-Whitelist-Flag:}{YES}}
+    dnslists   = zen.spamhaus.org
+    logwrite   = Warning: $sender_host_address is listed in DNSBL $dnslist_domain ${if def:dnslist_text {($dnslist_text)}}
+    add_header = X-DNS-Blacklist: $sender_host_address is listed in $dnslist_domain ${if def:dnslist_text {($dnslist_text)}}
+    add_header = X-Junk-Flag: YES
 
   # will never get here if X-Whitelist-Flag or X-Junk-Flag (gets set with X-DNS-Blacklist) or X-DNS-Whitelist headers are set above
 .ifdef GREYLIST_ENABLED