---
title: "Send email with design or HTML."
method: POST
path: "/emails/v1/send"
tags: ["emails"]
---

# Send email with design or HTML.

`POST /emails/v1/send`

Send email with design JSON or HTML content.

## Query parameters

- `projectId` string

## Request body

- object
  - `design` object, required — Proprietary design format JSON
  - `html` string — HTML content to send
  - `to` string, email, required — Recipient email address
  - `subject` string — Email subject line
  - `mergeTags` object — Optional merge tags for personalization

## Response `200`

Default Response

- object
  - `messageId` string — Unique message identifier
  - `status` 'sent' | 'queued' | 'failed'

## Other responses

- `400` — Default Response
- `401` — Default Response
- `403` — Default Response

## Changes

- **2026-01-13** `343ccfa7da7d` — 3 info
  - added the new optional `query` request parameter `projectId`
  - added the non-success response with the status `401`
  - added the non-success response with the status `403`
- **2025-12-10** `168db8cc4eb5` — 2 breaking
  - removed `subschema #1, subschema #2` from the request body `anyOf` list
  - the request property `design` became required
- **2025-12-09** `9c0284025bec` — 1 breaking, 1 info
  - api path removed without deprecation
  - endpoint added

[Change history](https://skmtc.dev/unlayer/apis/unlayer-api/changes/emails/v1/send/post.md)

---

[API](https://skmtc.dev/unlayer/apis/unlayer-api.md) · [All operations](https://skmtc.dev/unlayer/apis/unlayer-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/unlayer/unlayer-api/revisions/343ccfa7da7d/schema)