diff --git a/apps/patchwork/models.py b/apps/patchwork/models.py
index cfead27..8c5188f 100644
--- a/apps/patchwork/models.py
+++ b/apps/patchwork/models.py
@@ -45,6 +45,12 @@ class Person(models.Model):
     name = models.CharField(max_length=255, null = True, blank = True)
     user = models.ForeignKey(User, null = True, blank = True)
 
+    def save(self):
+        # Convert to lower case to avoid identical emails with case variations
+        # from being inserted in the DB.
+        self.email = self.email.lower()
+        super(Person, self).save()
+
     def __unicode__(self):
         if self.name:
             return u'%s <%s>' % (self.name, self.email)
diff --git a/apps/patchwork/tests/models.py b/apps/patchwork/tests/models.py
index 91bfb9d..bb26270 100644
--- a/apps/patchwork/tests/models.py
+++ b/apps/patchwork/tests/models.py
@@ -1,7 +1,8 @@
 
-from django.test import TestCase
+from django.db.utils import IntegrityError
+from django.test import TestCase, TransactionTestCase
 
-from patchwork.models import State
+from patchwork.models import Person, State
 from patchwork.tests.factory import factory
 
 
@@ -40,3 +41,11 @@ class UserProfileTestCase(TestCase):
         # profile.
         patches = profile.submitted_patches_waiting_feedback(patch1.project)
         self.assertEquals([patch1, patch2], list(patches))
+
+
+class PersonTestCase(TestCase):
+
+    def test_email_uniqueness_is_case_insensitive(self):
+        Person(email='foo.bar@example.com').save()
+        p2 = Person(email='Foo.Bar@example.com')
+        self.assertRaises(IntegrityError, p2.save)