Features - MailFabric

Transactional Send API

Simple REST API that works with any HTTP client. Send transactional emails with full template support, variable substitution, and attachment handling. Built for reliability with automatic retries and idempotency. Official SDKs for Node.js, Go, Python, and .NET.

curl -X POST https://api.mailfabric.io/v1/emails \
  -H "X-API-Key: mf_live_xxxx" \
  -d '{"to": "user@example.com", "template": "welcome"}'

Template Versioning & Governance

Full version control for email templates with approval workflows, instant rollback, and diff comparison. Never deploy a broken template to production again.

GET /v1/templates/welcome/versions

[
  { "version": 3, "status": "approved", "updated": "2026-02-01" },
  { "version": 2, "status": "approved", "updated": "2026-01-15" }
]

Webhooks with Replay

Real-time event notifications for every email lifecycle event. HMAC-signed payloads, automatic retries with exponential backoff, and delivery replay for debugging.

POST /your-webhook-endpoint

{
  "event": "email.delivered",
  "email_id": "em_abc123",
  "timestamp": "2026-02-09T12:00:00Z"
}

Real-Time Analytics

Comprehensive delivery metrics, bounce analysis, and engagement tracking. Monitor deliverability scores, track trends, and export data for compliance reporting.

GET /v1/usage/summary

{
  "sent": 45230,
  "delivered": 44980,
  "bounced": 125,
  "opened": 32100,
  "delivery_rate": "99.4%"
}

Multi-Environment Safety

Isolated dev, staging, and production environments with separate API keys and allowed email lists. Test safely without risking production deliverability.

# Development environment
X-API-Key: mf_dev_xxxxxxxxxxxx

# Production environment
X-API-Key: mf_live_xxxxxxxxxxxx

Built on AWS SES

Enterprise-grade deliverability powered by AWS SES with transparent reputation management, dedicated IP support, and automatic warmup. Full visibility into sending quotas and reputation scores.

GET /v1/domains/example.com

{
  "status": "verified",
  "dkim": "pass",
  "spf": "pass",
  "reputation": 98.5
}