added parameter for returned-path in Email::from()
diff --git a/user_guide_src/source/libraries/email.rst b/user_guide_src/source/libraries/email.rst
index f99eb91..8d2549d 100644
--- a/user_guide_src/source/libraries/email.rst
+++ b/user_guide_src/source/libraries/email.rst
@@ -117,6 +117,13 @@
$this->email->from('you@example.com', 'Your Name');
+::
+
+ $this->email->from('you@example.com', 'Your Name', 'returned_emails@example.com');
+
+Third parameter is redirect for undelivered emails (may not be configured with
+protocol 'smtp').
+
$this->email->reply_to()
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