I've signed up for the Ubuntu Newsletter (via the downloads page) several times (one of them I think being two years ago), and have never received one. I thought maybe they just didn't exist anymore, but then I saw this question, which provides a link to a recent one. Does Canonical still email out these newsletters?
PS I don't have a spam folder; the filter just adds "SPAM" in the subject of the email.
For clarification, I do not mean a downloads page for the newsletter.
See image here