MailU core.
Mailgun API speed.
A sovereign, high-throughput mail engine providing the reliability of MailU combined with a drop-in, Mailgun-compatible REST API for developers.
Engineered for sovereignty
Own your data plane without giving up developer ergonomics.
Drop-in Compatibility
Swap your Mailgun endpoint base URL for Qpost with zero code changes. Our API shim emulates the industry standard for seamless migration.
Sovereign Infrastructure
Built on top of MailU for hardened, containerized, self-hosted or isolated mail delivery. Complete ownership of your data plane and IP reputation.
Developer First
Built-in credential rotators, webhook management, and sub-millisecond routing loops. Real-time telemetry delivered via high-performance gRPC.
REST interface
POST /v3/messages
Authorization: Basic api:key-xxxxxx
Content-Type: application/x-www-form-urlencoded
from=Excited User <sender@qpost.example>
to=devs@company.io
subject=Hello via Qpost
text=Testing our new sovereign mail bridge.Qpost exposes a fully compatible RESTful layer, so your existing SDKs and libraries work without modification.
Unlimited Domains
Scale across thousands of sender domains without per-domain surcharges.
DKIM / DMARC Logic
Automated key rotation and policy enforcement out of the box.
Ready to reclaim your data plane?
Deploy a Qpost cluster in minutes, or talk to our infrastructure team first.