---
title: "Changes to Publish a message"
method: POST
path: "/conversations/custom-channels/2026-03/{channelId}/messages"
---

# Changes to Publish a message

`POST /conversations/custom-channels/2026-03/{channelId}/messages`

> Every recorded change to this operation, newest first.
> 14 revisions in range; 1 not diffed, 2 could not be searched.

## Timeline

Changed in 5 of 14 revisions.

- **2026-05-27** `f9c7181056c5`: 1 info
- **2026-05-07** `24a387456830`: 1 warning
- **2026-03-31** `f33be5a82610`: 1 info
- **2026-03-30** `dc2fdad57f7f`: 2 info
- **2026-03-25** `62586336cea2`: 1 info

## Changes

- **2026-05-27** `f9c7181056c5`: 1 info
  - added the new `hs_sourced_contact_origin` enum value to the request property `preResolvedContacts/contacts/items/contactPropertiesLeadingToMatch/items/`
- **2026-05-07** `24a387456830`: 1 warning
  - removed the request property `preResolvedContacts`
- **2026-03-31** `f33be5a82610`: 1 info
  - added the new `hs_email_live_sourcing_restricted` enum value to the request property `preResolvedContacts/contacts/items/contactPropertiesLeadingToMatch/items/`
- **2026-03-30** `dc2fdad57f7f`: 2 info
  - added the new optional request property `recipients/items/senderActorId`
  - added the new optional request property `senders/items/senderActorId`
- **2026-03-25** `62586336cea2`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/hubspot/apis/hubspot-api-specification/docs/conversations/custom-channels/2026-03/:channelId/messages/post.md) - [API](https://skmtc.dev/hubspot/apis/hubspot-api-specification.md) - [Page](https://skmtc.dev/hubspot/apis/hubspot-api-specification/changes/conversations/custom-channels/2026-03/:channelId/messages/post)