Refs #23919 -- Stopped inheriting from object to define new style classes.

django/core/mail/backends/base.py

@@ -1,7 +1,7 @@
 """Base email backend class."""
 
 
-class BaseEmailBackend(object):
+class BaseEmailBackend:
     """
     Base class for email backend implementations.
 

django/core/mail/message.py

@@ -223,7 +223,7 @@ class SafeMIMEMultipart(MIMEMixin, MIMEMultipart):
         MIMEMultipart.__setitem__(self, name, val)
 
 
-class EmailMessage(object):
+class EmailMessage:
     """
     A container for email information.
     """

django/core/mail/utils.py

@@ -7,7 +7,7 @@ import socket
 
 # Cache the hostname, but do it lazily: socket.getfqdn() can take a couple of
 # seconds, which slows down the restart of the server.
-class CachedDnsName(object):
+class CachedDnsName:
     def __str__(self):
         return self.get_fqdn()