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-rw-r--r--guides/source/4_0_release_notes.textile2
1 files changed, 2 insertions, 0 deletions
diff --git a/guides/source/4_0_release_notes.textile b/guides/source/4_0_release_notes.textile
index 8415f6f83a..3733fec950 100644
--- a/guides/source/4_0_release_notes.textile
+++ b/guides/source/4_0_release_notes.textile
@@ -112,6 +112,8 @@ h4(#railties_deprecations). Deprecations
h3. Action Mailer
+* Allow to set default Action Mailer options via <tt>config.action_mailer.default_options=</tt>.
+
* Raise an <tt>ActionView::MissingTemplate</tt> exception when no implicit template could be found.
* Asynchronously send messages via the Rails Queue.