PDF not attached to the email notification

the only thing not working is creating a pdf attached to the notification mail once a filled form is submitted. But that's perhaps another problem where I have to create a new question for?

Do you mean to say that the PDF is not attached to the email notification? If so, it is required to enable the PDF attachment option in the Advanced section of email settings. Please see the guide below:

https://www.jotform.com/help/503-How-To-Include-Submissions-As-PDF-Attachment-In-The-Email-Notifications

Hope this information helps! Let us know if you are referring something different. We will be happy to help. 

Yes, that's what I mean. I thought that this option was only for custom created pdf documents and that the option "Send uploads as attachment" enables a default pdf attachment. But apparently not. That will enable something else (that I don't use at the moment). This question can be closed.