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Migrate from Postmark

Motorical Sending SMTP is in the same job class as Postmark for transactional email (HTTP send + SMTP + delivery webhooks). This page is a thin mapping — not a feature-by-feature comparison. For product positioning see Compare.

A Motorical SMTP Motor Block is an isolated sending stream (similar to a per-app/per-tenant ESP project): its own domain, API keys, SMTP credentials, rates, logs, and webhooks.

Concept map​

Postmark-style conceptMotorical
Server / server tokenMotor Block + Motor Block API key mk_live_...
Send email HTTP APIPOST https://api.motorical.com/v1/send (Authorization: ApiKey or X-Api-Key)
SMTPmail.motorical.com:2587 (STARTTLS) or :2465 (implicit TLS)
Message stream / isolationSeparate Motor Blocks for apps, tenants, or staging vs production
WebhooksPublic API webhooks; verify X-Motorical-Signature
Sandbox / test senddryRun: true on POST /v1/send
Account API / statsMint bearer with ak_live_..., then /api/public/v1

Minimal send (HTTP)​

  1. Create a Motor Block and verify your sender domain.
  2. Create a Motor Block API key (mk_live_...).
  3. Dry-run, then send for real (omit dryRun or set false only when ready):
curl -X POST "https://api.motorical.com/v1/send" \
  -H "Authorization: ApiKey $MK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "noreply@yourdomain.com",
    "to": ["you@example.com"],
    "subject": "Migration dry-run",
    "text": "Hello from Motorical",
    "dryRun": true
  }'

Do not use OAuth or Bearer tokens on POST /v1/send.

Next steps​