我必须指定哪个链接以电子邮件联系表格7发送附件

I have a contact form without file tag. I wanna put in "file attachment" the url of my guide.pdf that I have put in media wordpress. the url is http://domain.it os the url of file is:

http://domanin/wp-content/uploads/2017/10/guide.pdf

when I put the link it appears me that the file doesn't exist.

Anyone can help me?

Contact Form 7 3.5 and higher support local file attachment. You can put local file paths in the ‘File attachments’ field and those files will be attached to the email as well as uploaded files.

Put a file path per line. When the path is not an absolute path, it will be treated as a relative path to wp-content directory.

uploads/2017/10/guide.pdf