Simple API
Send your first email in seconds
A single HTTP request is all you need. Posta handles queuing, SMTP delivery, retries, and tracking automatically.
curl -X POST https://posta.example.com/api/v1/emails/send \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"from": "Acme <hello@example.com>",
"to": ["jonas@example.com", "bob@example.com"],
"subject": "Hello from Posta",
"html": "<h1>Hello!</h1>"
}'
{
"id": "0ae4b04e-5c64-4b2f-bad6-460f8d5d98b3",
"status": "queued"
}
Features
Everything you need to deliver email
A complete email infrastructure platform — outbound and inbound delivery, templates, campaigns, contacts, tracking, webhooks, workspaces, security, and a built-in dashboard.
Email Delivery
REST API for transactional, batch, and templated sends with attachments, scheduling, retries, and priority queues.
Inbound Email
Built-in SMTP receiver with TLS plus HMAC webhook ingest, attachment storage, forwarding, and a real-time SSE stream.
Templates & Localization
Version-controlled templates with multi-language fallback, variable substitution, and CSS inlining.
Campaigns
Bulk sending with subscriber targeting, timezone-aware scheduling, A/B testing, and send-rate throttling.
SMTP & Domains
Configure multiple SMTP providers, share pools across teams, and verify domains with SPF, DKIM, and DMARC.
Security
API keys with IP allowlists, JWT auth, two-factor authentication, OAuth/SSO, and rate limiting.
Contacts & Subscribers
Auto-tracked contacts, static and dynamic lists, bulk CSV/JSON import, and automatic suppression handling.
Tracking & Analytics
Pixel-based open and click tracking, per-email engagement metrics, Prometheus integration, and dashboards.
Webhooks & Events
Event-driven delivery with HMAC signatures, retry strategies, delivery tracking, and audit logs.
Workspaces & RBAC
Multi-tenant isolated workspaces with role-based access, member invitations, and workspace-scoped API keys.
Official SDKs
Client libraries for Go, PHP, and Java with typed errors and full API coverage.
GDPR & Compliance
Per-contact data export, import, and deletion tools to keep your sending compliant.
Ready to run your own email platform?
Deploy Posta with Docker in minutes and send your first email today.