When you add files as attachments to a Pronotif notification, they are not actually sent in an email. Your attachments are sent through a secure tunnel (HTTPS) to our servers. Once on Pronotif, the files are saved in a “secure container”, and only download links are included in an email to your recipients. These links will then lead to a web page that will allow recipients to download the document and verify its integrity (SHA256 key) if they wish.