Are asking where and/or how to place the pdf on your site so people can access it?
If so, here is what you can do:
First, upload the pdf to your website - this is how:
Create a folder in your file manager called pdfs
Upload your pdfs to that folder
Next you can do one of two things:
Link directly to the pdf in your email.
Like: "http://www.yourwebsitename.com/pdfs/newsletter.pdf"
Here is a more detailed explanation of the link above:
"http://yourwebsiteurl/name folder created to hold the pdfs/name of actual pdf file"
Or you can create a simple web page which has a link to the pdf on it. The link in your email would direct them to the page rather than to the actual PDF.
Like: "http://www.yourwebsitename.com/newsletter.html"
I hope that answered your question. If not, just ask again