My mother-in-law always breaks my express. How can I break it?

Opening other people's letters without permission, peeking at other people's diaries, spying on other people's private documents and making them public all belong to the category of infringement of privacy.

But you need to prove that the email is really yours. She opened it without permission and knew it.

Suggestion: It is better to communicate with your mother more, and you should also clarify the privacy category.