Sigh. People really don't understand GDPR. Saying that it's ok for your employer to read your work emails because you gave them permission when you signed a mandatory form. Nope. Permission must be voluntary and permission asked by an employer to an employee is very rarely considered voluntary by a judge even if it's framed that way. Reading emails in a work email account is something an employer can often do under GDPR but it's more likely than not justified by legitimate interest of the employer or legal requirements.