Relax the RegEx restrictions to allow the new ICAAN TLDs.

AUTHORS

@@ -206,3 +206,4 @@ that much better:
  * Clay McClure (https://github.com/claymation)
  * Bruno Rocha (https://github.com/rochacbruno)
  * Norberto Leite (https://github.com/nleite)
+ * Jay Shirley (https://github.com/jshirley)

mongoengine/fields.py

@@ -160,8 +160,8 @@ class EmailField(StringField):
         r"(^[-!#$%&'*+/=?^_`{}|~0-9A-Z]+(\.[-!#$%&'*+/=?^_`{}|~0-9A-Z]+)*"
         # quoted-string
         r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|\\[\001-011\013\014\016-\177])*"'
-        # domain
-        r')@(?:[A-Z0-9](?:[A-Z0-9-]{0,253}[A-Z0-9])?\.)+[A-Z]{2,6}$', re.IGNORECASE
+        # domain (max length of an ICAAN TLD is 22 characters)
+        r')@(?:[A-Z0-9](?:[A-Z0-9-]{0,253}[A-Z0-9])?\.)+[A-Z]{2,22}$', re.IGNORECASE
     )
 
     def validate(self, value):

tests/fields/fields.py

@@ -2902,6 +2902,9 @@ class FieldTest(unittest.TestCase):
                            "aJIazqqWkm7.net"))
         self.assertTrue(user.validate() is None)
 
+        user = User(email="new-tld@example.technology")
+        self.assertTrue(user.validate() is None)
+
         user = User(email='me@localhost')
         self.assertRaises(ValidationError, user.validate)