@Anewbooknotanewchapter
I am really worried that my employer has access to my work email account. I have sent private information via work email to colleagues/my line manager related to absences linked to very personal and private events that have affected my ability to do my job/be in work over the last couple of years...... I had no idea IT department could just root through these as and when they pleased.
Anything you put in an email can be accessed by the admin of the email service.
The "admin" isn't necessarily one person. In a medium/small business it can be up to 10 people.
That said, whilst they have admin privilege they also have admin accounts, which in any reputable company are logged and routinely reviewed.
As an admin, if you were found to have inappropriately accessed information (emails/documents/files) or changed the permissions of other users you would be fired. It's gross misconduct.
As the saying goes "with great power comes great responsibility".
So I'm answer to your post - yes your employer has access to your emails.
However, in any company with good IT practice the IT staff are not rooting round your emails.
They would need authority to do so and their access to your account would be logged. If it was not authorised they would face disciplinary action.