# Announcement-only streams

{!admin-only.md!}

By default, anyone who belongs to a stream can also send messages to the
stream. However, sometimes it's useful to have a stream (often a
[default stream](/help/set-default-streams-for-new-users)) where only
organization administrators can send messages.

### Restrict posting to organization administrators

{start_tabs}

{relative|stream|all}

1. Select a stream.

1. On the right, click **[Change]** next to the description of the stream
   permissions.

1. Click **Restrict posting to organization administrators**.

1. Click **Save Changes**.

{end_tabs}