[Manticora777]

Email is sensitive information: knowing the address alone, you can identify a name, phone number, find social media accounts, etc. Let's say you receive an email offering to donate money to a charity. At the same time, it smells like scam: stylistic errors, crooked structure, informal tone. Plan of action:

Contact the police - doesn't work. There have been cases where the authorities were contacted knowing the name of the perpetrator, and he still went unpunished. The Internet is like Gotham in the DC universe: it's practically free to rob.

It's up to you to break through the intruder. Bruce Wayne from the same DC universe knew that the law wouldn't find his parents' killers. And he didn't expect karma to catch up with them either. He took responsibility and became Batman.

The Cyber Detective Library is the League of Shadows for anyone who wants to learn how to punch in, including via email: the best cyber espionage tools are here. But just knowing them isn't everything: you need attention and the ability to pick out what's important. You can't teach them: they come with experience. Use the tools and gain experience.