What is an inbox in Slack?
At the beginning, MailClark's users needed to invite MailClark to a channel prior to connect an email, Twitter account or Facebook Page. The channel in which MailClark was connected was called "Inbox".
Since then, we changed our onboarding process and introduced the connectors.
You might have seen on the pricing page that you're on the "Pay per inbox" plan because you've subscribed to MailClark prior our new pricing. We plan to discontinue this "Pay per Inbox" pricing so we advice you to switch to the "Pay per connector" or the "Unlimited Plan".
Contact our team if you need more informations on this new pricing and how it would affect you.