The European Court of Human Rights in Strasbourg has long voiced its views on the possibilities of employers to monitor employee e-mail communications. This is a dispute when Bogdan Barbulescu was denied access to private business. What was confirmed by the Romanian authorities, respectively. justice.
However, the conclusion of the European Court is clear: the employer must notify you that your email (and other) communication is being monitored. In addition, such monitoring must have a legitimate reason, for example, the security of its IT may be compromised.