Email Delivery

Send single, template, and batch emails via REST API with attachments, scheduling, and delivery tracking.

Templates & Localization

Version-controlled templates with multi-language support, variable substitution, and CSS inlining.

SMTP & Domain Management

Configure multiple SMTP servers and verify domains with SPF, DKIM, and DMARC.

Security

API keys with IP allowlists, JWT auth, two-factor authentication, and rate limiting.

Webhooks & Events

Real-time notifications on email events with HMAC signature verification and retry logic.

Official SDKs

Client libraries for Go, PHP, and Java with typed errors and full API coverage.