This recent question here on meta has brought to my attention something I never realized before - non-employee moderators have access to some tools that can disclose an user EMail address.
I wasn't able to find any definitive info, only this relevant passage:
We collect information such as your username, password, email address, IP address (collected at each site visit). This information is also used to identify individual users to the public Network and to award activities and attribute them to you. Your username and additional content you provide including your profile picture, question and answer content, and your reputation are visible publicly. Other limited information is visible to moderators, who have elevated access privileges, and may access content including your posts. For more information about moderators and their role in the Stack Overflow Network, please visit: /help/site-moderators.
Sadly, this doesn't seem to further elaborate what other "limited information" is visible to moderators.
I am therefore asking for support here: is there a page that list which users PII non-employee are granted access to? Or can anyone give me some info in that regard?