Inbox Placement Tests
Send to our seed list across Gmail, Outlook, Yahoo, Apple, and regional providers. See Primary vs Promotions vs Spam for each provider and every seed IP.
Learn moreAll the tools you need to fix deliverability — fast
Inbox placement testing, full DNS/auth auditing, blacklist monitoring, and developer-friendly APIs — packaged for teams who need results.
- 98%Avg inbox placement
- 24hAvg issue resolution
- APIFull programmatic access
Core features
Everything you need to diagnose and fix deliverability, from DNS records to content-based placement.
Auth & DNS Audits
Full SPF / DKIM / DMARC checks, BIMI suggestions and MTA-STS support. We give copy-paste DNS records and a one-click verification flow.
Learn moreBlacklist Monitoring
Continuous polling of major RBLs with automated alerts and step-by-step delisting instructions tailored to each list.
Learn moreAPI & Webhooks
Programmatic access to tests, results, and real-time webhooks for CI/CD and internal dashboards. Clean JSON responses and per-organization API keys.
Learn moreAutomated Fixes
Actionable fixes with copy-paste DNS records and recommended template/content edits to improve placement probability.
Learn moreAnalytics & Reporting
Daily trends, historical comparisons, and white-label PDF reports your team can download and share with stakeholders.
Learn moreHow teams use Kix6
From growth teams proving inbox delivery to engineering teams automating checks in their deploy pipelines — Kix6 fits into existing workflows with minimal setup.
- Automated pre-release deliverability checks via API
- Daily inbox placement alerts for campaign QA
- One-click DNS record suggestions for developers
Feature comparison
Which plan has what — pick the right fit for your team.
| Feature | Starter | Growth | Pro |
|---|---|---|---|
| Inbox placement tests /month | 100 | 500 | 2000 |
| Domains monitored | 5 | 15 | Unlimited |
| Auth & DNS fixes | Yes | Yes | Yes (whitelabel) |
| Blacklist monitoring | Basic | Advanced | Priority |
| API access | — | Yes | Yes (rate limit boost) |
Frequently asked
Answers to common questions about Kix6 features and workflows.
How long does a placement test take?
Most placement tests complete within 10–30 minutes; larger batches may take longer depending on provider throttling.
Can I automate checks in CI?
Yes — our REST API and webhooks are designed for automation. Ship a test on each deploy and fail builds when critical auth checks fail.
Do you provide delisting help?
Yes — we surface delisting steps tailored to each blacklist and provide recommended communication templates.
How do you protect seed list privacy?
Seed list addresses are used only for placement testing and are not used to generate or store marketing data. We maintain strict access controls and rotate seeds regularly.
Ready to diagnose your deliverability?
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