Email delivery is important for businesses and testing that delivery from your site ensures that no hidden issues are present.
A site is doing a redirect and the redirect is back to the same URL - it self. There are a few reasons why this may happen from Wordpress, web server configs to any rewrites in place and at times CloudFlare.
Resetting a user's password in Wordpress can be done by using the forgot password link on the login page. Passwords can also be set via the wordpress admin when logged in with a wordpress administrator user.