zulip/templates/zerver/help/stream-sending-policy.md

Stream posting policy

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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) where only certain users can send messages.

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1. Select a stream.

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1. Click the pencil () to the right of Stream permissions.

2. Under Who can post to the stream?, select the option you prefer.

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