diff --git a/README.md b/README.md
index eb883da..055a0ae 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,17 @@ Or you could go beyound simple matching and validate that all email adresses bel
       :with => proc { |address| address.end_with?("@substancelab.com") }
     }
 
+You can even match against multiple rules, in which case all rules must pass:
+
+    validates :email, :email_address => {
+      :with => [
+        proc { |address| address.match(/.+@.+\..+/) },
+        proc { |address| !address.end_with?("@outlook.com") },
+      ]
+    }
+
+Do note that supplying your own rules means that the default email address validation isn't run - you're on your own, basically.
+
 ### Verify domain (still to be done - pull request, anybody?)
 
 This also checks that the domain actually has an MX record. Note this might take a while because of DNS lookups.
diff --git a/test/test_active_model_integration.rb b/test/test_active_model_integration.rb
index 9825637..4a1710c 100644
--- a/test/test_active_model_integration.rb
+++ b/test/test_active_model_integration.rb
@@ -69,6 +69,16 @@ def test_validates_with_multiple_procs
     reject("bob", subject)
   end
 
+  def test_rules_overwrite_default_rule
+    subject = build_model_with_validations(
+      email: {email_address: {
+        with: proc { |address| true }
+      }}
+    )
+
+    accept("anything", subject)
+  end
+
   private
 
   def accept(email_address, subject)