---
title: "Send a mail message"
method: POST
path: "/mail/v1/inboxes/{inboxId}/messages/send"
tags: ["Agents"]
---

# Send a mail message

`POST /mail/v1/inboxes/{inboxId}/messages/send`

Send a message from an inbox owned by the authenticated organization.

## Path parameters

- `inboxId` string, required

## Response `202`

Message accepted for delivery

## Other responses

- `401` — Invalid API key
- `403` — Write access required
- `404` — Inbox not found

---

[API](https://skmtc.net/casemark/apis/case-dev-api.md) · [All operations](https://skmtc.net/casemark/apis/case-dev-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/casemark/case-dev-api/versions/5b7e64e6d6f9/schema)