Hi, @egoitzr
I referred to the original post you made in which Amy has provided some suggestions to you here:
There is a setting here that might help: https://docs.mattermost.com/administration/config-settings.html#enable-users-to-open-direct-message-channels-with .
We are currently also exploring other alternatives, such as single and multi-channel guest accounts: https://mattermost.uservoice.com/forums/306457-general/suggestions/9982719-ee-single-channel-guests-for-non-team-members .
Apart from that, we don’t have any new features that caters to the requirement yet. May I know if you have looked at any of the options above?