Learn>DNS>TTLLearning pathAuthentication↓DNS↓Reputation↓Warmup↓Deliverability↓Inbox PlacementTTLTime to live — how long resolvers may cache a DNS answer.Reading time: 5 minDifficulty: BeginnerEstimated duration: 5 minPrerequisites: DNSLast updated: 2026-07-15Author: empirePrerequisitesDNSDomain Name System — the lookup fabric email authentication depends on.Related ConceptsDNSDomain Name System — the lookup fabric email authentication depends on.Relevant WorkflowsRoll DNS changes with TTL strategyLower TTL, dual-publish, cut over, then raise TTL again.Where do you want to go next?DNSDomain Name System — the lookup fabric email authentication depends on.PreviousSOA recordsNextDNS propagation