set score of URIBL_PBL to +0.01 (be less penalising here)

conf/scores.d/surbl_group.conf

@@ -163,7 +163,7 @@ symbols = {
         description = "A domain listed in the mail is listed in Spamhaus XBL URIBL";
     }
     "URIBL_PBL" {
-        weight = 0.1;
+        weight = 0.01;
         description = "A domain listed in the mail is listed in Spamhaus PBL URIBL";
     }
     "URIBL_DROP" {