Prevent users from sending messages with shared channels

Admins may want teammates using an inbox to only send messages with their own individual channel. This could be because they want a consistent customer experience or in some cases to avoid sending an email to customer A from the customer_b@mycompany.com shared channel.

This is partially solved if teammates are invited with a blank default channel, and then the teammate's individual channel will become their default once it is added. However, this is only a default so still leaves room for a shared channel to be used accidentally, for example, if a teammate changes their default channel preference or their individual channel loses authentication.

How could we allow admins to prevent shared channels being used? Some potential solutions:

• Introduce channel access controls, to define which teammates can access a certain channel

• Admins can specify whether a channel can be used for outbound messages. This could be an inbox-level setting, and allow admins to select 'Individual channels only'

• Prevent users from changing their default channel preference

• Allow admins to build customized warnings, that display to users if they try to send an message with the wrong channel