Truncus is the infrastructure layer below your email API. Deterministic delivery, a durable retry queue, governance, and EU data residency — in one integration.
Everything on this page is live in production. No roadmap, no “coming soon” — features appear here after they ship in code.
Know what happened to every email. Not “accepted” — delivered, bounced, or rejected.
A confirmation primitive, not a batch tool — single recipient, by design. One API call, one definitive answer: delivered, bounced, or rejected.
Every email reaches a terminal state — delivered, bounced, or rejected. No "accepted" limbo. You always know what happened.
When delivery fails, Truncus explains why (ISP block, full mailbox, invalid MX) and recommends a specific action.
When a send fails, you find out immediately — and transient failures retry on their own.
Transient failures are retried with backoff from a durable queue. Nothing is dropped on the floor when a send doesn’t go through first time.
Failure-rate monitoring on the SES Ireland path. When errors spike, the circuit opens and surfaces the exact error — fail-fast, no silent failures.
Replay failed deliveries from the event log without resending. Operational resilience without duplicate emails.
API uptime commitment with credit schedule. Pro and Scale plans.
Control who sends what, from which domain, and stop it instantly when something goes wrong.
One API call stops all sending for your whole account (needs a key with the send scope). Scheduled and queued mail is held; resume from the dashboard.
Bounce and complaint rates tracked per account. Automatic throttling and suspension when thresholds are exceeded.
Confidence scoring, spam risk check, and domain health assessment before the email leaves your infrastructure.
Public. No login. No auth. Never cached. Point your monitoring at /api/status before you even have an account.
Sent and stored in the EU, encrypted, GDPR-ready. Built for teams that need to pass security review.
Email delivery on AWS SES eu-west-1 (Ireland), with an EU failover leg on Scaleway TEM (fr-par, France). No international transfer for email content.
All data encrypted in transit (TLS) and at rest (AES-256). API keys hashed with SHA-256, never stored in plain text.
Real-time delivery events via signed webhooks. Delivery, bounce, complaint, open, and click events.
Content deduplication with SHA-256 hashing in a 10-minute window. Safe retries without duplicate sends.
Paste 4 NS records once. Truncus provisions and owns SPF, DKIM, DMARC, MTA-STS, TLS-RPT — and re-asserts them when they drift. Prefer holding your own records? Manual mode exists.
A copy-paste prompt your computer-use agent executes at your DNS provider.
Free tier includes 3,000 emails/month. No credit card required.
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