Emails sent through Regpack cannot have attachments.
Instead, you can upload your documents on a hosting site and use the link provided directly in your emails.
If you need us to upload and host those documents, pictures, or PDF's for you, just email email@example.com with those attachments. We will then provide a URL that you can use in your emails.
See the screenshot below for where to find the URL link in the email editing module. Paste your document link, and your email recipients will have a link they can click that will display your documents or PDFs.