You just pulled your bounce rate after a send and you don't know if it's bad. Here's the number that matters: under 2% total, with hard bounces under 1%, is what Apollo publishes as the standard to expect from any paid B2B data provider, including itself. Validity's independent benchmark puts bounce rates for permission-based email marketing generally around 1.5%, a different and cleaner population than purchased B2B data, so treat it as a directional cross-check, not proof the same number applies to your list. Above 2% on a purchased list, you're not looking at a fluke campaign. You're looking at a list problem.
The threshold: under 2%, hard bounces under 1%
Apollo publishes a specific ladder for buyers evaluating any paid data provider, itself included.
| Total bounce rate | What it signals |
|---|---|
| Below 1% | Excellent |
| 1-2% | Caution |
| 2-5% | Warning |
| Above 5% | Critical |
Apollo's own SLA guidance narrows the hard-bounce figure further: below 1% is best-in-class, 1-2% is acceptable but worth watching, and above 2% signals a real list-quality problem rather than noise. Soft bounces get their own target, under 0.5%. Data freshness matters too. Apollo treats a contact verified within 30 days as best practice, and within 90 days as the minimum acceptable standard before a number should be trusted at all.
How that compares across email marketing generally
Validity's 2025 Email Deliverability Benchmark Report cites an industry figure of about 1.5% for permission-based email marketing bounce rates. That's separate from the report's own seed-list testing across hundreds of mailbox providers, which produces its inbox-placement and spam-foldering findings elsewhere in the same report. The 1.5% figure still sits inside Apollo's "excellent to caution" band, useful as a directional cross-check since Validity has no stake in how Apollo's own data performs.
The two numbers aren't measuring quite the same thing, worth being precise about. Apollo's guidance is scoped to paid B2B data specifically, the kind you buy to build a prospecting list. Validity's 1.5% covers permission-based email marketing broadly, most of which is sent to people who signed up themselves. A colder, purchased list landing anywhere near 1.5% would be unusually clean. Landing under 2% is the more realistic bar, and it's still the one worth holding yourself to.
What crosses the line actually costs you
Bounce rate feeds directly into whether your email gets delivered at all, and not just for the send that triggered it. Google's current bulk-sender guidelines, in effect since February 2024, set a hard threshold on a related but different metric: spam complaints, not undeliverable addresses, capped at 0.3% with guidance to stay under 0.10%. Apollo and Google don't state a direct causal link between the two numbers, but the reasonable inference holds: a list that bounces heavily is, in practice, also more likely to get marked as spam by the people it does reach.
Cross either threshold consistently and the consequence is Gmail, Yahoo and Microsoft quietly routing more of what you send to spam, for every list after this one too, because sender reputation doesn't reset between campaigns.
What bounce rate can't tell you
A clean bounce rate isn't the same as a good list. Bounce rate only catches addresses that don't exist. It says nothing about a catch-all domain that accepts every message and bounces none of them, a contact who left the company eight months ago but whose old email still technically works, or a person who exists, receives your email, and simply isn't the right fit for what you're offering. All three pass a bounce-rate check clean and still waste the send.
That's the honest limit of a single metric that's otherwise genuinely useful. Bounce rate is the cheapest, most measurable signal available for list quality, and it's also only one of several things that determine whether a list is worth sending to.
What to actually check before you send
Bounce rate tells you whether the addresses exist. It doesn't tell you whether the people behind them are the right ones, or whether the data is still current enough to trust. Both of those need checking separately, on their own terms, before the send rather than after the bounce report comes back.
Frequently asked
- What is a good email bounce rate?
- Under 2% total, with hard bounces under 1%, is the threshold Apollo states for buyers evaluating any paid B2B data provider. Validity's independent 2025 benchmark puts the broader email-marketing average at 1.5%, which is a useful cross-check even though it covers a different population than purchased B2B data specifically.
- What's the difference between a hard bounce and a soft bounce?
- Apollo's guidance treats them differently: hard bounces (an address that doesn't exist) should stay under 1%, while soft bounces (a temporary delivery failure) have a looser target, under 0.5%.
- Does a low bounce rate mean my list is good?
- Not on its own. Bounce rate only catches addresses that don't exist. It won't catch a catch-all domain, a contact who's changed jobs but whose old address still technically works, or a correct address that simply isn't the right person for your offer.
- How does bounce rate affect deliverability?
- Indirectly but consistently. Google's bulk-sender guidelines, in effect since February 2024, require spam complaint rates under 0.3%, a different metric from bounce rate. Neither Google nor Apollo states a direct causal link between the two, but a bounce-heavy list is, in practice, also more likely to generate spam complaints. Cross either threshold consistently and mailbox providers start routing more of what you send to spam, which affects every future campaign, not just the one that triggered it.
- How fresh does contact data need to be?
- Apollo's own guidance treats verification within 30 days as best practice and within 90 days as the minimum acceptable standard before a contact's email should be trusted.