nginx proxy pass subpaths not redirected

Question

I have the following nginx config:

    location /mail {
           rewrite           ^/mail/(.*) /$1 break;
           proxy_pass https://roundcube-host;
            


        

Answer 1

If I change it to the below with the extra / it matches everything beyond mail as well as /mail directly.

location /mail/ {

}

NGINX 1.14.2