Email is only protected under certain circumstances, and the law does not contemplate protection against the provider… only the provider’s disclosure of your email to third parties. However, internal disclosure is, as far as I know, not prohibited.
Refer to the Email Privacy Act (USA) and the GDPR for more info.
Note: Best to consult a privacy lawyer versus a Melpomene if you have questions. @RoboRay
Agree, which is why I shared. Just looping you in as a courtesy!