Quick Page/post Redirect Plugin -

Used when a page has moved forever. This passes nearly all "SEO link juice" from the old URL to the new one.

If you are writing a new post but want it to point elsewhere (like an external resource or a landing page), scroll down to the bottom of the post editor. You’ll see a box titled Enter your destination URL there, and anyone who clicks that post title in your archives will be sent straight to the new link. SEO Best Practices for Redirects quick page/post redirect plugin