smtp.dev

Guides

Testing patterns

Focused workflows for CI assertions, catch-all QA addresses, authentication checks, E2E flows, email clients, and AI agents.

CI

Send from tests, poll the API, and assert on the newest matching message.

Catch-All

Use wildcard accounts and plus aliases for isolated QA addresses.

SPF/DKIM/DMARC

Read sender authentication fields and audit output from message JSON.

E2E Flows

Drive password resets and signups with real links from captured email.

Email Clients

Use the web UI and API today, with IMAP/POP3 client support planned.

AI Agents

Give agents disposable addresses and API access for OTP or confirmation flows.