// DELIVERABILITY

Hard bounce

A hard bounce is a permanent delivery failure caused by an invalid address, dead domain, or rejected sender.

// IN PRACTICE

Every hard bounce damages reputation. Verify before every send.

// RELATED TERMS
Bounce rateSoft bounce

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// MORE
SPFDKIMDMARCMX recordDNS propagationTXT recordCNAMEWarmupPre-warmed mailboxInbox placementDeliverabilitySender reputation
// READY

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