---
title: "Changes to Send a single send transactional email asynchronously."
method: POST
path: "/marketing/transactional/2026-09/single-email/send"
---

# Changes to Send a single send transactional email asynchronously.

`POST /marketing/transactional/2026-09/single-email/send`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 3 revisions.

- **2026-09-03** (2026-09) `a04185df14f9`: 2 warning, 1 info

## Changes

- **2026-09-03** (2026-09) `a04185df14f9`: 2 warning, 1 info
  - added the new `CONTACT_VIEW_PERMISSION` enum value to the `sendResult` response property for the response status `200`
  - added the new `MARKETING_ACTIVATION_DISALLOWED` enum value to the `sendResult` response property for the response status `200`
  - the endpoint scheme security `private_apps` was removed from the API

---

[Operation](https://skmtc.dev/hubspot/apis/marketing-transactional-single-send/docs/marketing/transactional/2026-09/single-email/send/post.md) - [API](https://skmtc.dev/hubspot/apis/marketing-transactional-single-send.md) - [Page](https://skmtc.dev/hubspot/apis/marketing-transactional-single-send/changes/marketing/transactional/2026-09/single-email/send/post)