1 files changed, 23 insertions, 1 deletions
diff --git a/actionmailer/CHANGELOG.md b/actionmailer/CHANGELOG.md
index 1867a392eb..5a61746700 100644
--- a/actionmailer/CHANGELOG.md
+++ b/actionmailer/CHANGELOG.md
@@ -1,4 +1,26 @@
-*   Add mailer previews feature based on 37 Signals mail_view gem
+*   Support the use of underscored symbols when registering interceptors and
+    observers like we do elsewhere within Rails.
+
+    *Andrew White*
+
+*   Add the ability to intercept emails before previewing in a similar fashion
+    to how emails can be intercepted before delivery.
+
+    Fixes #13622.
+
+    Example:
+
+        class CSSInlineStyler
+          def self.previewing_email(message)
+            # inline CSS styles
+          end
+        end
+
+        ActionMailer::Base.register_preview_interceptor CSSInlineStyler
+
+    *Andrew White*
+
+*   Add mailer previews feature based on 37 Signals mail_view gem.
 
     *Andrew White*