We are rolling out better support for managing users who unsubscribe from emails.
Users can now unsubscribe and resubscribe to all email correspondence from within the application.
On the user administration screen, administrators can see who is unsubscribed and resubscribe them if necessary
The problem where some mail server filters follow all links in an email and inadvertently cause the address to be unsubscribed has been mitigated by requiring acknowledgement of the subscription.