Postmark has introduced a new feature allowing users to invite team members and clients to view their email sending stats, digests, and reports. This is made possible through the creation of a "Users" page where team members can be managed with Gravatar profiles, providing a personalized touch. The "Permissions" tab on the server page enables simple permission management, allowing users to configure access both per person and per server. Users will receive an email notification when given access to a new server. This update marks a significant change in Postmark's authentication system, switching from usernames to using email addresses as usernames, with unique username and email address requirements.