SESMetric · transactional + AI marketing email
Email that always lands. Campaigns your AI agent runs.
One platform, two rails: transactional mail over SMTP, REST, and MCP — and AI-written marketing campaigns your agent creates, targets, and sends from ai.sesmetric.com/mcp, on a dedicated delivery pool that never touches your receipts.
const tx = nodemailer.createTransport({
host: "smtp.sesmetric.com", port: 2525,
auth: { user, pass },
});
await tx.sendMail({ from, to, subject, html });By the numbers
Five years in, the math is consistent.
Features
Built for the receipts that have to ship.
Marketing campaigns, run by your AI
Connect Claude, ChatGPT, Cursor — any MCP client — to ai.sesmetric.com/mcp and manage the whole campaign lifecycle: contacts, segments, AI-generated content, drips, scheduling, analytics. Sends ride a dedicated pool, isolated from transactional.
35+ templates, out of the box
Password resets, welcome, receipts, invoices — send any system template via /v1/send without cloning. Branding auto-applied. Plus a marketing template catalog you can extend and manage over MCP.
Event pipeline you can read
Sends, opens, clicks, bounces, complaints — streamed to a dashboard built for actually debugging. Engagement flows back into contact profiles, so segments can target openers and clickers automatically.
And the obvious table-stakes
Sub-second accept
SMTP ack in under 2s at p95. Worker threads don't block.
Reputation isolation
Per-user routing. Watchdog flips noisy senders off the shared IP.
Developer-first APIs
REST mirrors SES SendRawEmail; SDKs for 10+ languages.
Multi-domain ready
Verify as many sending domains as you like on paid plans.
SOC 2 + GDPR
Type II audited. Data residency on request.
Idempotent retries
Replay-safe Message-ID. No duplicate sends from upstream timeouts.
Webhooks per event
Signed HMAC. Configurable per-type, retry with backoff.
Historical export
CSV out of the dashboard, no quota. Pull deliveries back to your warehouse.
How it works
Four steps. The longest one is waiting for DNS.
01
Sign up + verify
Email signup. Verify a domain or single address in the dashboard. Total: 60 seconds.
- No credit card
- Guided DKIM / SPF setup
- Auto-poll until DNS clears
02
Drop in creds
Paste SMTP host + creds into the framework you already use. Or hit the REST endpoint with curl.
- nodemailer / Django / Rails
- Postmark-shaped REST
- Per-app API keys
03
Send
Your first message ships in under 5 minutes. The free tier is 100 a day, forever.
- Idempotent Message-ID
- Reroute per-user on the fly
- Sandbox mode for dev
04
Watch where it lands
Live event dashboard. Filter by domain, recipient, status. Export to CSV.
- Open / click tracking
- Bounce + complaint feed
- Webhooks per event
Step five, if you want it: point your AI agent at ai.sesmetric.com/mcp and let it run your marketing campaigns too.
Pricing
Start free. Scale only when you ship more than 100 a day.
Free
Try it. No card.
100 / day
- 1 sending domain
- SMTP + REST + MCP
- AI campaigns (free-tier model)
Monthly
Predictable.
1M / month
- Unlimited domains
- AI campaigns (premium models)
- Priority support
Annual
Two months free.
1M / month
- Everything in Monthly
- Extended support hours
- Locked rate
FAQ
The questions everyone asks first.
Still confused? Drop us a line — actual engineers reading the inbox.
ContactReady when you are
First transactional mail in five minutes. First AI campaign right after.
Sign up, paste SMTP creds, send. Then verify a domain, point your AI agent at ai.sesmetric.com/mcp, and let it write and run your first campaign. Free tier gives you 100 transactional emails a day, forever.
No card · 100 emails / day free, forever · cancel paid plans any time