it's original plugin...
// allow plug-ins to control the redirect url after login success
$redir = $RCMAIL->plugins->exec_hook('login_after', $query + array('_task' => 'mail'));
unset($redir['abort'], $redir['_err']);
// send redirect
$OUTPUT->redirect($redir, 0, true);
AND
it's modify plugin
$redir = $RCMAIL->plugins->exec_hook('login_after', $query + array('_task' => 'compose'));
unset($redir['abort'], $redir['_err']);
pls Ans me..it's right or wrong...