diff --git a/docs/releasenotes.rst b/docs/releasenotes.rst
index 937f89b7a8480ca631e6de0ad5b4dce47585ba5e..1cfa02cfcfdb7baeba3bc2de4384cad4bc55cf00 100644
--- a/docs/releasenotes.rst
+++ b/docs/releasenotes.rst
@@ -56,6 +56,12 @@ New features/improvements:
 * Tests have been updated to work with latest Molecule/Testinfra as
   part of the Ansible upgrade process.
 
+* ``mail_server`` role
+
+  * The role now supports specifying the maximum mail message size
+    limit for the SMTP server to accept via
+    ``mail_message_size_limit`` role parameter.
+
 Deprecations:
 
 * ``backup_server`` and ``backup_client`` role