The Blogger blog feed - what it is, how to identify its URL, and why it doesn't work - is a frequent subject of many discussions in BHF: How Do I? . Many times, when it doesn't work, the problem can be traced to improper use of the feed redirect setting . What Blogger labels as the "Post Feed Redirect URL" would be, more accurately, labeled as the "Post Feed Subscription Redirect URL". or possibly the "Redirected Post Feed URL". Use of this setting does not redirect the feed to another URL, it simply redirects references to the feed (for instance, subscriptions by your readers) to the URL of another feed, which is sourced from your blog feed. The most famous (though not the only possibility ) redirection choice is FeedBurner. By "burning" a FeedBurner feed based upon your blog post feed, you can give your readers many choices that are not provided in the native blog posts feed . Blogger instructs us If you have burned your post...
What Blogger won't tell you