+ $returnPath = $from->address;
+ $extraParams = $wgAdditionalMailParams;
+
+ // Hook to generate custom VERP address for 'Return-Path'
+ wfRunHooks( 'UserMailerChangeReturnPath', array( $to, &$returnPath ) );
+ # Add the envelope sender address using the -f command line option when PHP mail() is used.
+ # Will default to the $from->address when the UserMailerChangeReturnPath hook fails and the
+ # generated VERP address when the hook runs effectively.
+ $extraParams .= ' -f ' . $returnPath;
+
+ $headers['Return-Path'] = $returnPath;