For the complete site index, see llms.txt. Docs index: llms-docs.txt. Marketing corpus: llms-full.txt. Docs corpus: llms-full-docs.txt. Prefer markdown URLs where available (append .md).. Product skill: skill.md. Pricing: pricing.md. Docs MCP: /docs/mcp. Site MCP: /mcp.

Email infrastructure
built for builders

Campaigns, transactionals, SMTP, analytics, and developer tools—on one platform.

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Core capabilities

Everything you need to send, measure, and improve email.

AI Agents

Email infrastructure for autonomous agents and LLMs.

Transaction Emails

Low-latency transactional delivery for developers.

Email Templates

Design and manage reusable email templates.

SMTP Relay

Managed SMTP with TLS, auth, and fast delivery.

Email Analytics

Opens, clicks, conversions, and real-time reports.

Email Validation

Verify addresses before send to protect reputation.

Deliverability

Spam testing, reputation monitoring, and auth setup.

Languages & SDKs

Quickstarts for every supported client library.

Build & integrate

APIs, SDKs, and workflows for engineering teams.

Developers

APIs, SDKs, and sandbox tooling built for DX.

Webhooks

Real-time events for delivery and engagement.

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