Ticket #17870: Ticket17870-2.patch

django/db/models/fields/__init__.py

@@ -890 +890 @@
     description = _("E-mail address")
 
     def __init__(self, *args, **kwargs):
+        # max_length should be overridden to 254 characters to be fully 
+        # compliant with RFCs 3696 and 5321
+
         kwargs['max_length'] = kwargs.get('max_length', 75)
         CharField.__init__(self, *args, **kwargs)
 

docs/ref/models/fields.txt

@@ -481 +481 @@
 
 A :class:`CharField` that checks that the value is a valid email address.
 
+.. admonition:: Incompliance to RFCs
+
+    The default 75 character ``max_length`` is not capable of storing all
+    possible RFC3696/5321-compliant email addresses. In order to store all 
+    possible valid email addresses, a ``max_length`` of 254 is required. 
+    The default ``max_length`` of 75 exists for historical reasons. The 
+    default has not been changed in order to maintain backwards 
+    compatibility with existing uses of :class:`EmailField`.
+
 ``FileField``
 -------------