add labels for old headlines

Author: xabbuh

email/dev_environment.rst

@@ -53,6 +53,8 @@ will not be sent when you run tests, but will continue to be sent in the
 If you'd also like to disable deliver in the ``dev`` environment, simply
 add this same configuration to the ``config_dev.yml`` file.
 
+.. _sending-to-a-specified-address:
+
 Sending to a Specified Address(es)
 ----------------------------------
 

reference/configuration/swiftmailer.rst

@@ -32,7 +32,7 @@ Configuration
 * `antiflood`_
     * `threshold`_
     * `sleep`_
-* `delivery_address`_
+* `delivery_addresses`_
 * `delivery_whitelist`_
 * `disable_delivery`_
 * `logging`_
@@ -145,6 +145,8 @@ sleep
 Used with ``Swift_Plugins_AntiFloodPlugin``. This is the number of seconds
 to sleep for during a transport restart.
 
+.. _delivery-address:
+
 delivery_addresses
 ~~~~~~~~~~~~~~~~~~