self-hosted transactional email
Email that is deliverable.
An open-source, Resend-compatible email platform you run yourself. Accounts for your team, Amazon SES or any SMTP behind it, DKIM, tracking, broadcasts — one container, zero vendors.
docker compose up -d · MIT licensed · your data stays yours
- transports
- 4
- transports
- builder blocks
- 12
- builder blocks
- API scopes
- 8
- API scopes
- webhook events
- 9
- webhook events
Your first email is one POST away.
import { SendThen } from 'sendthen';
const st = new SendThen('st_xxxxxxxx');
await st.emails.send({
from: 'you <hello@yourdomain.com>',
to: 'user@example.com',
subject: 'Welcome aboard',
html: '<strong>It just sends.</strong>',
});Every message, routed & delivered.
Bring your own pipes
Amazon SES, any SMTP relay, direct-to-MX, or a zero-network sandbox — per team, switchable in Settings. SES runs on signed HTTP, no SDK.
Tuned for the inbox
Verified sending domains with one-click DNS checks, 2048-bit DKIM per domain, automatic bounce & complaint suppression via SES feedback.
Opens, clicks, webhooks
Signed tracking pixel and link redirects, svix-compatible HMAC webhooks with up to 5 delivery attempts and backoff — nine event types, delivered and logged.
Broadcasts & templates
Audiences, per-contact {{variables}}, RFC 8058 one-click unsubscribe, reusable templates, batch and scheduled sends — the marketing side, self-hosted too.
Inbound too
Receive mail on your domains via MX, SES, or HTTP ingest. Read parsed messages in the dashboard and forward them anywhere.
A no-code studio
A visual template builder with 12 blocks and starter presets. Designs stay re-editable and compile to bulletproof table HTML.
Everything in the box.
- teams & invites
- scoped API keys
- batch sending
- scheduled sends
- idempotency keys
- attachments
- templates + variables
- broadcasts + one-click unsubscribe
- suppression list
- SES / SMTP / direct / sandbox
- open & click tracking
- svix-compatible webhooks
- inbound email + forwarding
- analytics
- one SQLite file
Simple pricing.
Hosted plans that stay cheaper than the incumbents — or self-host and pay nothing, forever.
Free
$0- ✓ 100 emails / day
- ✓ 3,000 / month
- ✓ every feature included
Pro
$10/mo- ✓ 50,000 emails / month
- ✓ no daily cap
- ✓ $0.50 per extra 1,000
Self-hosted
free- ✓ unlimited everything
- ✓ your server, your data
- ✓ MIT licensed
Self-host in a minute.
git clone https://github.com/emreisik95/sendthen && cd sendthen docker compose up -d # open http://localhost:3000 → create the admin account
One container, one SQLite file — back it up with a copy, move it with a scp.
Own your email pipeline tonight.
docker run, set a password, add your domain. Everything on this page runs on your box.