Email template & css on the control
When I set email template on the control I saw an error (in the attaachement). So, when I created uploads/tx_auxnewsmailer category then the control was saved successively. I don't know if TYPO3 should create this direstory or the extension. But this reveals new problem. The html & plain text previews are empty. This is because saved record have only file names. Withour any path.