update changelog

Author: frederikbosch

CHANGELOG.md

@@ -7,6 +7,13 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 
+## [2.12.4] - 2025-01-29
+
+### Fixed
+
+- Return-Path header must use angle brackets and can be empty
+
+
 ## [2.12.3] - 2025-01-28
 
 ### Fixed