According to the docs and this post, a user clicking on a failed verification email link should be redirected to the same redirect url as a successful verification, with some additional params, ie. application.callback_domain/email=john%40acme.com&message=Access%20expired.&success=false#.
Please confirm if my understanding is correct. Currently, successful verifications are redirected to our redirect URL. However, I seem to be having a similar issue to the aforementioned post: users clicking an expired verification email are sent to a standard Auth0 page https://{{...}}.auth0.com/u/email-verification?ticket={{...}}.
Cheers.