从Zend Framework中的默认模块调用操作

Question

I have the following structure of folders in Zend Framework:

Application
- default
-- controllers
--- mailController.php
- modules
-- asegurados
--- controllers
---- indexController.php

I have an action in mailController which sends a mail (sendmailAction), and I want to send the exact mail in indexController in a function called sendmailAction. How can I call from IndexController::sendmailAction() to MailController::sendmailAction()?

I've tried the following:

/** indexController.php **/
public function sendformatosAction() {
    ...
    $M = new MailController();
    $M->sendmailAction();   
    ...
}

But it seems that it's not loading the proper class. Can you help me, please? thanks!!