Big email 3.0 API changes, with updated unit tests and documentation.
Briefly (from the NEWS file):

- Updates for the email package:
  + All deprecated APIs that in email 2.x issued warnings have been removed:
    _encoder argument to the MIMEText constructor, Message.add_payload(),
    Utils.dump_address_pair(), Utils.decode(), Utils.encode()
  + New deprecations: Generator.__call__(), Message.get_type(),
    Message.get_main_type(), Message.get_subtype(), the 'strict' argument to
    the Parser constructor.  These will be removed in email 3.1.
  + Support for Python earlier than 2.3 has been removed (see PEP 291).
  + All defect classes have been renamed to end in 'Defect'.
  + Some FeedParser fixes; also a MultipartInvariantViolationDefect will be
    added to messages that claim to be multipart but really aren't.
  + Updates to documentation.
diff --git a/Lib/email/MIMEMessage.py b/Lib/email/MIMEMessage.py
index 2042dd9..3021934 100644
--- a/Lib/email/MIMEMessage.py
+++ b/Lib/email/MIMEMessage.py
@@ -1,8 +1,8 @@
-# Copyright (C) 2001,2002 Python Software Foundation
-# Author: barry@zope.com (Barry Warsaw)
+# Copyright (C) 2001-2004 Python Software Foundation
+# Author: Barry Warsaw
+# Contact: email-sig@python.org
 
-"""Class representing message/* MIME documents.
-"""
+"""Class representing message/* MIME documents."""
 
 from email import Message
 from email.MIMENonMultipart import MIMENonMultipart
@@ -24,7 +24,7 @@
         """
         MIMENonMultipart.__init__(self, 'message', _subtype)
         if not isinstance(_msg, Message.Message):
-            raise TypeError, 'Argument is not an instance of Message'
+            raise TypeError('Argument is not an instance of Message')
         # It's convenient to use this base class method.  We need to do it
         # this way or we'll get an exception
         Message.Message.attach(self, _msg)