Resend-compatible API — drop-in migration

Email infrastructure
built for delivery.

Transactional and marketing email from a single API. Self-hosted, multi-IP rotation, intelligent warmup, list hygiene, and AI-powered campaign tooling — all in one platform.

Resend-compatible REST API
Automated IP warmup
Multi-IP rotation
SOC-2 ready audit logging

Everything delivery demands.

From a single send to millions of messages — 3AVA Mail gives you the infrastructure layer that production email requires.

Multi-IP Sending Pool

Route traffic across dedicated IP pools per domain, project, or volume tier. Automatic failover ensures deliverability when a single IP faces temporary blocks.

Automated IP Warmup

New IPs follow science-backed volume schedules. 3AVA Mail tracks engagement signals in real-time and adjusts ramp curves automatically to protect sender reputation.

List Management & Verification

Built-in address verification, bounce classification, and suppression lists. Automatically prune hard bounces, complaints, and role-based addresses before each send.

AI Campaign Tooling

Generate subject lines, preview text, and full HTML body with integrated AI assistance. A/B variant creation, send-time optimisation, and audience segmentation, all via API.

Webhook Delivery

Real-time event streaming for sent, delivered, opened, clicked, bounced, and complained events. Automatic retries with exponential backoff and signed payloads for verification.

Resend-Compatible REST API

Identical request/response format to Resend. Swap one base URL and your existing SDK calls work instantly — no code changes required. Official SDKs for Node, Python, and Go.

One endpoint.
Every channel.

A single authenticated POST to /emails handles transactional, marketing, and bulk sends identically. No separate client libraries, no mode-switching.

Full DKIM, DMARC, and SPF support per sending domain
Idempotency keys prevent duplicate sends in retry scenarios
Attachment support up to 40 MB per message
Scheduled delivery — pass an ISO timestamp, we handle the queue
# Send a transactional email via 3AVA Mail API

curl -X POST https://api.3ava.com/emails \
  -H "Authorization: Bearer <API_KEY>" \
  -H "Content-Type: application/json" \
  -d '{
    "from":    "Acme [email protected]",
    "to":      ["[email protected]"],
    "subject": "Your order has shipped 🚀",
    "html":    "<p>Track it at <a href='...'>here</a></p>",
    "tags": [
      { "name": "category", "value": "order-shipped" }
    ]
  }'

# Response
{
  "id":     "msg_01jx4n8fa...",
  "from":   "[email protected]",
  "to":     ["[email protected]"],
  "status": "queued"
}
<120ms
Median API response
time (p50)
99.9%
Uptime SLA across
all sending nodes
Multi-IP
Dedicated IP pools
with auto-failover
1-click
Migrate from Resend,
Postmark, or SendGrid