So your connection can be (using port 587 for example) is encrypted. That is not the problem.
The problem is unencrypted or open filenames. Its the content that is DMCA’d on usenet, not the end user.
If you post up to usenet a file (being really simplistic since most people dont post) called “Deadpool3-h264.mkv” it will be taken down pretty quick on some services.
The problem is only with the users like you, who wanted to get it. The solution to this is threefold, get yourself onto a private scraper (one that only does occasional free signups) or be really fast on content grabbing, thirdly a site that has good de-obfuscating scraping ability. (there are a few out there that are open. pm if you are interested).