SendBolt Docs
Send transactional + marketing email through your own infrastructure without standing up a Postfix farm. Bring a domain, point DNS, hit one endpoint per recipient. Bounces, complaints, suppressions, warmup, DKIM rotation, and deliverability monitoring are handled for you.
Start here
Getting started
Five-minute setup: tenant → API key → domain verify → first send.
API Reference
Endpoints, auth, errors, rate limits, SDKs, live Swagger UI.
sendbolt-cli
Single-binary CLI for send, contacts, domains + GitHub Action.
Pick your path
- I just signed up — get me from 0 to first delivered email in 30 minutes
- I need to send signup verification emails right now
- I'm about to launch a 50k campaign — what could go wrong?
Common recipes
Signup verification
Send a one-time-code or click-to-confirm email when a user signs up.
Welcome email
Triggered seconds after the verification clicks through.
Magic-link login
Passwordless auth — single-use, 30-minute expiry.
Password reset
HMAC-signed reset URL with replay protection.
Payment receipt
Triggered by your Stripe webhook with line items.
Weekly newsletter
List-based campaign with auto-suppress + unsubscribe.
Affiliate / sub-ID tracking
Stamp aff / SID / S1 / Value1c on contacts; segment by source.
Reference
- API keys & auth
- API Reference (Swagger UI)
- DNS records (SPF / DKIM / DMARC / MX)
- Deliverability checklist
- IP / domain warm-up
- Inbound mail webhook
Compare to a hosted ESP
| Capability | SendBolt | SendGrid / Mailgun |
|---|---|---|
| Per-tenant DKIM + DMARC alignment | ✅ | ✅ |
| Bounce / complaint auto-suppression | ✅ | ✅ |
| Domain warm-up curve | ✅ | ✅ |
| Per-recipient send-time AI | ✅ | ✅ (Pro) |
| Pre-send spam-score predictor | ✅ | ❌ |
| Pre-send bounce-risk predictor | ✅ | ❌ |
| Dedicated IP pools | ✅ | ✅ (Pro) |
| Inbound parse + retry queue | ✅ | ✅ |
| SOC2 daily evidence pack | ✅ | ✅ (Enterprise) |
| Your data, your VPS | ✅ | ❌ |
| Per-1k pricing | $0.58 → $0.27 (Starter → Scale) | $0.80 → $0.10 (low → enterprise) |