diff --git a/Tests/spfcheckTest.php b/Tests/spfcheckTest.php
index 154ac16..30bad15 100644
--- a/Tests/spfcheckTest.php
+++ b/Tests/spfcheckTest.php
@@ -196,6 +196,18 @@ class spfcheckTest extends PHPUnit_Framework_TestCase
         "mx" => array ())));
   }
 
+  public function test_wideIPRange ()
+  {
+    $spfcheck = new spfcheck ();
+    $spfcheck->getRecords ("wide.spf.tester.fournier38.fr");
+    $res = $spfcheck->getErrors ();
+    $this->assertSame ($res,
+      array ("wide.spf.tester.fournier38.fr" => array (
+        "ip4:213.131.32.0/2" => "Invalid ip4 set for domain 'wide.spf.tester.fournier38.fr' : Mask '/2' too wide",
+        "ip6:2001::/20" => "Invalid ip6 set for domain 'wide.spf.tester.fournier38.fr' : Mask '/20' too wide"
+   )));
+  }
+
   public function test_getRecords_Unknown ()
   {
     $spfcheck = new spfcheck ();
diff --git a/spfcheck.php b/spfcheck.php
index ce557ad..f1da9aa 100644
--- a/spfcheck.php
+++ b/spfcheck.php
@@ -320,6 +320,15 @@ class spfcheck
               $domain, $ext);
             continue;
           }
+          if ($mask !== "" &&
+              filter_var ($ip, FILTER_VALIDATE_IP,  FILTER_FLAG_IPV4) &&
+              substr ($mask, 1) < 16)
+          {
+            $this->errors[$domain][$part] = sprintf (dgettext ("domframework",
+              "Invalid ip4 set for domain '%s' : Mask '%s' too wide"),
+              $domain, $mask);
+            continue;
+          }
           $ips[$domain][$part][] = $ip.$mask;
         }
         // }}}
@@ -343,6 +352,15 @@ class spfcheck
               $domain, $ext);
             continue;
           }
+          if ($mask !== "" &&
+              filter_var ($ip, FILTER_VALIDATE_IP,  FILTER_FLAG_IPV6) &&
+              substr ($mask, 1) < 64)
+          {
+            $this->errors[$domain][$part] = sprintf (dgettext ("domframework",
+              "Invalid ip6 set for domain '%s' : Mask '%s' too wide"),
+              $domain, $mask);
+            continue;
+          }
           $ips[$domain][$part][] = $ip.$mask;
         }
         // }}}