Fixed validation of email addresses when the local part contains an @.

See also BaseUserManager.normalize_email -- it uses rsplit.

Refs #4833.

django/core/validators.py

@@ -106,7 +106,7 @@ class EmailValidator(object):
         if not value or '@' not in value:
             raise ValidationError(self.message, code=self.code)
 
-        user_part, domain_part = value.split('@', 1)
+        user_part, domain_part = value.rsplit('@', 1)
 
         if not self.user_regex.match(user_part):
             raise ValidationError(self.message, code=self.code)

tests/modeltests/validators/tests.py

@@ -31,6 +31,7 @@ TEST_DATA = (
     (validate_email, 'test@domain.with.idn.tld.उदाहरण.परीक्षा', None),
     (validate_email, 'email@localhost', None),
     (EmailValidator(whitelist=['localdomain']), 'email@localdomain', None),
+    (validate_email, '"test@test"@example.com', None),
 
     (validate_email, None, ValidationError),
     (validate_email, '', ValidationError),