Why a destination URL may be blocked or reviewed
Understand blacklisted and unlisted domains.
A URL on a blacklisted domain or its subdomains cannot be saved. The editor shows a warning beside the URL field.
Links on domains outside the allowed list can be saved and published, but they appear in the administrator review queue. The administrator can allow the domain, disable the link or blacklist the domain.
A domain added to the blacklist also disables matching existing links and removes matching country redirect URLs. Removing a domain from the blacklist does not automatically restore those links.