Files attached to the newsletter

Excellent!
Thank you.

Not working.
Error:
0 Call to undefined function finfo_open()

This error means that the PHP finfo_open() function is not available in your environment.
This function is part of the Fileinfo extension, which is used to detect the MIME type of files.
Are you trying on a server or a local environment? Which PHP version are you using?
This extension is enabled by default in PHP.

Solved.
Thank you.

You are very welcome!