How often is the SBL zone updated?
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How often is the SBL zone updated?
The SBL DNS zone is rebuilt and reloaded every 5 minutes, 24/7, to ensure that new spam problems are swiftly blocked and that fixed problems are swiftly removed.
- To ensure high redundancy, Spamhaus has over 80 public DNSBL mirror servers located around the world.
- All respond in realtime to public queries.