I’m unhappy with Kickbox false positives on valid emails

That’s frustrating. False positives on valid emails usually mean the verification signal is too aggressive or the mailbox provider is making delivery look risky even when the address is real.

A few practical things you can do:

1. Check which status is being returned

   • See whether Kickbox is marking them as:
     • deliverable but risky,
     • risky,
     • catch-all,
     • unknown,
     • or undeliverable.
   • If the issue is mostly “catch-all” or “unknown,” those often get mistaken for false positives.

2. Review your threshold

   • Don’t block solely on one status if your business can tolerate a little risk.
   • Many teams use a combination like:
     • block only undeliverable
     • manually review risky/unknown
     • allow deliverable and maybe some catch-all depending on use case

3. Look for patterns in the false positives

   • Are they all on:
     • Gmail / Outlook / Yahoo?
     • corporate domains?
     • role accounts like info@, support@?
     • newly created domains?
   • Patterns can reveal whether this is a provider-specific limitation rather than bad data.

4. Test a sample set

   • Recheck a handful of addresses with another validation tool to compare results.
   • If multiple tools say the emails are valid, it’s likely a verifier limitation rather than actual invalid addresses.

5. Consider the tradeoff

   • Email verification tools are probabilistic, not perfect.
   • If false positives are hurting conversions, you may want to bias toward fewer rejections and handle bounces later.

6. Talk to Kickbox support

   • If you have concrete examples, send them a list of addresses and timestamps.
   • Vendors can sometimes explain whether the result came from SMTP behavior, greylisting, catch-all detection, or provider policy.

If you want, I can help you:

• interpret specific Kickbox result labels,
• design a safer accept/reject policy,
• or compare Kickbox against other validation options.