There seems to be no way to do this, anyone has an idea? There also seems to be some chrome plugins that offer solutions, although I tried a few and none worked, and some methods I've seen on medium are outdated with slack's updates to the application process.
What is the easiest way to delete all slack messages in the #General channel?
4.8k views Asked by grandisonan At
1
Note: It's not possible to bulk delete messages. Owners and admins can delete a channel to remove all its messages. Owners on paid subscriptions can also set a retention policy to automatically delete messages after a certain amount of time.
https://slack.com/intl/en-au/help/articles/202395258-Edit-or-delete-messages