SMTP

⚡ Built-in — Email

Send transactional email through your own SMTP server (Gmail, Outlook, custom mailserver). Bring your own credentials — full control over deliverability and sender reputation.

⚡ Built-in — No Setup Required This integration is built into the WebsitePublisher platform. All endpoints are available immediately — no API key needed.

Endpoints (3)

POST send-email

Queue an email for asynchronous delivery via SMTP. Returns immediately; worker picks up the job from the smtp queue. Use this for normal transactional sends (form notifications, confirmations).

Field	Type	Required	Description
`to`	string\|array	✓ Yes	Recipient email address, or array of addresses (max 50)
`subject`	string	✓ Yes	Email subject line
`html`	string	No	HTML body content. Provide either html, text, or both.
`text`	string	No	Plain text body (fallback for clients that do not render HTML)
`reply_to`	string	No	Reply-to address (optional — defaults to from address)

POST send-emails

Send multiple emails in a single TCP connection (keep-alive). Synchronous — returns per-email status. Use for newsletters or batched notifications. Max 50 emails per call.

Field	Type	Required	Description
`emails`	array	✓ Yes	Array of email objects, each with: to (string\|array), subject (string), html (string), text (string), reply_to (string)

POST test-connection

Validate SMTP credentials by performing the full TCP + TLS + AUTH handshake against the configured server. No email is sent. Returns duration_ms on success, mapped error message on failure.

No input parameters required.

MCP Tool Names

When using this integration through an AI assistant (Claude, ChatGPT, Cursor, etc.), the endpoints are available as MCP tools:

Endpoint	MCP Tool Name
send-email	`smtp_send_email`
send-emails	`smtp_send_emails`
test-connection	`smtp_test_connection`

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