Platform Live · v1.0

Enterprise Email Delivery
Built to Scale

Multi-tenant, multi-provider email platform with automatic failover, reputation management, Redis caching and real-time delivery analytics.

📖 Read the API Docs Browse Documentation

Platform Capabilities

Everything you need to send at scale

From OTP to marketing campaigns — one platform handles it all with per-tenant isolation, intelligent routing and automatic recovery.

🔀

Multi-Provider Routing

Route by domain, type or custom rules. Auto-failover keeps OTPs delivering even when a provider is down.

📎

Email Attachments

Up to 10 files, 10 MB total. Base64 encoded. Stored in DB — fully reconstructed on server restart.

⚡

Priority Queues

5-tier queue system. OTPs are never held up by bulk marketing sends.

🧠

Reputation Engine

Real-time bounce/complaint tracking. Auto-restricts sending when score drops below threshold.

🔴

Redis Cache Layer

Tenant config, routing rules and credentials cached with TTL. 9 DB queries reduced to 3 per send.

🔒

Multi-Tenant Isolation

Independent limits, API keys, suppression lists and audit logs per tenant.

🌡️

Domain Warmup

Automatic 14-day warmup ramp. New sending domains never get flagged as spam.

🪝

Signed Webhooks

Ed25519 signature verification on every incoming webhook event. Unsigned events rejected.

Quick Start

Send your first email in 30 seconds

curl example

curl -X POST https://your-domain.com/api/email/send \
  -H "x-api-key: kf_em_xxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "to":          "user@example.com",
    "subject":     "Welcome!",
    "serviceType": "TRANSACTIONAL",
    "htmlBody":    "<h1>You are in!</h1>"
  }'

# 202 Accepted
{ "messageId": "8b33601b-9c94-45f1-8613-6b10973b31b0", "status": "queued" }