What's new entry for email 5.1.
diff --git a/Doc/whatsnew/3.2.rst b/Doc/whatsnew/3.2.rst
index 97a1696..2e7deec 100644
--- a/Doc/whatsnew/3.2.rst
+++ b/Doc/whatsnew/3.2.rst
@@ -184,6 +184,34 @@
PEP written by Barry Warsaw.
+Email 5.1
+=========
+
+The email package is extended to be able to parse and generate email messages
+in bytes format.
+
+* New functions :func:`~email.message_from_bytes` and
+ :func:`~email.message_from_binary_file`, and new classes
+ :class:`~email.parser.BytesFeedParser` and :class:`~email.parser.BytesParser`
+ allow binary message data to be parsed into model objects.
+
+* Given bytes input to the model, :meth:`~email.message.Message.get_payload`
+ will by default decode a message body that has a
+ :mailheader:`Content-Transfer-Encoding` of `8bit` using the charset specified
+ in the MIME headers and return the resulting string.
+
+* Given bytes input to the model, :class:`~email.generator.Generator` will
+ convert message bodies that have a :mailheader:`Content-Transfer-Encoding` of
+ 8bit to instead have a 7bit Content-Transfer-Encoding.
+
+* New class :class:`~email.generator.BytesGenerator` produces bytes
+ as output, preserving any unchanged non-ASCII data that was
+ present in the input used to build the model, including message bodies
+ with a :mailheader:`Content-Transfer-Encoding` of 8bit.
+
+ (Proposed and implemented by R. David Murray, :issue:`4661`.)
+
+
Other Language Changes
======================