How can I (or is it possible) to remove some blog posts out of a feed such as Google Feedburner? I have removed some from my blog but obviously looks like they are cached somehow. I just don't want some of the blog posts to be able to be read through anyone who subscribes...I don't want them to see those posts that I removed in the future in the feed itself.
Am I asking the impossible here? I don't know how RSS works in terms of cache/history.