← GlossaryDefinition
What is Bounce rate?
The share of sent emails that couldn't be delivered — a key deliverability signal.
Bounce rate is the percentage of emails that fail to deliver, split into hard and soft bounces. It's one of the clearest signals mailbox providers use to judge whether you're a sender worth trusting.
Most healthy B2B senders sit around or under 2%; cold outreach to unverified lists often runs far higher. Verifying before every send is the most direct way to keep the rate in the safe zone.
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