You can now grant access to your Tettra account to users who are guests in or outside your Slack organization. This is a great way to share knowledge with contractors, clients, or others outside your company with whom you work closely.
To invite an email user click the
Invite teammates button on the team members page:
On the team members page you can identify what type of account each user has. Email users have a default avatar and cannot update Slack webhooks or share pages to Slack channels.