How to restrict who can post on a channel in Slack?

Question

I want to have a special channel primarily to post company's announcement in my Slack team, and I don't want anybody, except me and a select few people, to post in that channel, to not distract the channel viewer from the announcement content. But I still want everybody to be able to see the content of the channel (e.g. making it one of the default channels new user automatically joins to). Can I do that in Slack? How? Or is there an alternative or workaround to achieve the similar result?

Answer 1

You can restrict who can post to the #general channel on your team settings, in http://my.slack.com/admin/settings#permissions

Available restrictive options are Team Owners and Admins or Team Owners only.

You can rename #general to something more appropriate like "#announcements".

Currently, you cannot restrict posting rights to other public channels than #general.

More information is available on https://get.slack.help/hc/en-us/articles/220105027-The-general-channel

Answer 2

There still is no way to do it inside Slack :( but I've worked around this by using a simple Slack App using Amazon AWS Lambda. The actual Lambda python function could just as easily be modified to run on some other server, of course.

https://github.com/flipswitchingmonkey/SlackMonitor

Answer 3

You can do this now in Slack

• Create your channel.
• Right click on channel name in the side bar, and choose Open channel details
• Click Settings | Posting Permissions
• Select the You and Specific People radio button, and add team members that are allowed to post to this channel.
• Uncheck Allow Threads

Answer 4

we also need to have some channels that only certain people can post and readonly for others, so I've wrote very simple script that does it for us. You can take a look https://github.com/ypogorelova/slack_blockbot