How do I let my existing subscribers read the feed, with the blog published to a new URL?This blog owner is planning ahead - which is a good idea whenever renaming a blog.
The Post Feed Redirect is a key tool, whenever you rename or replace your existing blog, with a blog published to a new URL.
If you use a Post Feed Redirect, however, you need to add it to the old blog - or to a stub blog, published to the old URL - not to the new blog. You redirect from the old URL, to the new URL.
Don't redirect the feed, for the new URL.
But how do I serve both the readers subscribed to the old URL, and those subscribed to the new URL, if I redirect the feed?Don't make this mistake, and redirect the new blog (URL) feed. This blog owner is taking the name "Post Feed Redirect" literally.
The name "Post Feed Redirect" is misleading. You do not use the "Post Feed Redirect" to redirect the feed - you use it to redirect feed references.
Anybody subscribed to the old feed URL has the subscription (ie, the reference) redirected, to the new URL - if you add a Post Feed Redirect to a stub blog, published to the old URL.
Look below the post, here - near the bottom of the page. Do you see
Subscribe to: Post Comments (Atom)That is a comments feed reference. It lets people subscribe to the comments newsfeed, for this post.
Look at the main page for this blog. At the bottom of the main page, you will see
Subscribe to: Posts (Atom)That is a post feed reference. It lets people subscribe to the blog posts newsfeed.
If I was to rename this blog, the URL of the feed would change. I could then add a stub blog, published to the old URL - then redirect the feed reference, using a PFR, for the people who are subscribed to my blog under that URL.
That's what the Post Feed Redirect does - it redirects the feed references - when you set it properly.