Include email addresses (or some info) for domain notifications
If you're doing a domain notification (notifying of any info for your domain that becomes compromised), you'd like to relay concerns to your users when those alerts come up. Right now, we're just getting a number of accounts, rather than the actual specifics. Even listing email addresses would help.
The reason email addresses are not included in the notification is that email isn't considered a secure channel and the information can be sensitive. For example, I wouldn't want to see membership of a site like Ashley Madison communicated insecurely.
Every domain notification email has a link to run another domain search which will allow you to see everyone involved in the incident.