Blacklist
A list of known risky domains, URLs, senders, or indicators.
Why it matters
Blacklists can help block known threats, but new phishing pages may appear before lists update.
Example pattern
A security tool blocks a domain after it is reported and confirmed malicious.
How CheckLink can help
CheckLink focuses on available signals and manual review rather than relying only on lists.
Related terms
Related guides
Check the signal in context
Security terms are useful, but real decisions need context. Use CheckLink to inspect available signals before you click.