What is the file size limit of email attachment?

So does this feature create links to the storage space on the JotForm backend? Or does this just act as a email attachment with the small file size limit? What is the file size limit?

Please note that the file which user upload in form will be sent as email attachment. That means the limit of file type and file size is what you configure in the file upload field.

No it will not create any file link but when the file is uploaded in form and form is submitted, it will be sent in email as attachment.

You may like to take a look at the following guide which should help you understand the upload file size limit: https://www.jotform.com/help/33-Changing-the-File-Upload-Size-Limit  

Hope this helps.

Do get back to us if you have any questions.