On lot of old posts the answer was just to go
include('full path to zend lib/Some lib.php');
but in zend 2.2.4 in one module there is lot of dirs and subdirs I don't think it would be good to include all of that.
Also saw lot of answers:
require_once 'Zend/Loader/Autoloader.php';
Zend_Loader_Autoloader::getInstance();
but because of above mentioned problem I can't use it either.
So question is how to upload just email module (like every regular class) and use it? Is it even possible or I have to install full framework (I had lot of troubles installing it and still didn't manage to install...) ?
I suppose you should be able to install any Zend framework component via Composer.