[alberts00]

HaveIBeenPwned now has feature set to find e-mail addresses which were breached under a domain, there is normally no need to search for separate aliases if you own the e-mail domain.

https://haveibeenpwned.com/DomainSearch

[koheripbal]

Unfortunately the email notifications don't tell you WHICH email addresses leaked.

[funnybeam]

Yes they do, you just have to click the link in the email and request the full report