Have questions? We'd love to hear from you.
Or email us directly at control@kaijuverifier.com
When your outbound campaign is blocked by an unexpected SMTP 550 5.7.1 rejection, a broken SPF/DMARC alignment, or an urgent CRM migration deadline, waiting 72 hours for tier-1 ticket triage is unacceptable. At KaijuVerifier, every support inquiry is routed directly to a senior deliverability and network engineer.
Use this channel to request custom high-volume credit packages (1,000,000 to 100,000,000+ verifications), countersign a bespoke GDPR / UK GDPR Data Processing Agreement (DPA), troubleshoot webhook HMAC-SHA256 signatures, or schedule a guided architecture review of your sending domains. When reaching out to our engineering desk, you can include your sending domain, sample SMTP 550/421 diagnostic logs, or your expected monthly API verification volume so a senior postmaster specialist can run a live DNS, MX, SPF, DKIM, DMARC, and PTR pre-assessment before replying. Enterprise procurement teams can also request SOC 2 / ISO 27001 security documentation, custom rate-limit allocations above 250 requests per second, and dedicated isolated worker pools. Whether you are migrating a multi-million-row customer database from a legacy verifier, debugging custom HMAC-SHA256 webhook payloads in Node.js, Python, Go, or PHP, or setting up automated DMARC aggregate XML reporting and BIMI Verified Mark Certificates, our deliverability architects provide direct, code-level guidance without scripted tier-1 support delays, ensuring immediate resolution for mission-critical B2B outbound, transactional, and lifecycle email operations worldwide.
| Support & Inquiry Channel | Target First-Response SLA | Scope of Engineering Assistance |
|---|---|---|
| Technical API, Webhook & Batch Support | < 2 Business Hours (24/7 Critical Monitoring) | REST API debugging, .XLSX parsing & SMTP status forensics |
| Enterprise Volume & Procurement Desk | < 4 Business Hours | Custom 1M–100M+ credit quotes, invoicing & SAML SSO setup |
| Legal, Privacy & GDPR DPA Compliance | < 1 Business Day | Countersigned Article 28 DPAs, SCCs & security questionnaires |
Our deliverability engineers respond to all API, webhook, DNS authentication, and billing tickets within 2 business hours (and under 30 minutes for Enterprise SLA customers).
Yes. Contact our team on this page to countersign a custom GDPR Data Processing Agreement, configure dedicated SMTP probe pools, or lock in volume rates for 1M to 50M+ monthly verifications.