This is an automated click-time link-safety service. Links in protected email are routed through click.mxflo.io so each destination is checked for phishing and malware the moment it is opened — then you are forwarded to the real site.
There is nothing to do here: you have reached the service root directly. A protected link looks like https://click.mxflo.io/r/<id> and redirects to its true destination after a safety check.
Security & abuse reports: abuse@mxflo.io