I have recently tried to book a holiday via a lettings site but my emails were being intercepted by a 3rd party who told me that the holiday had been reserved for me, and gave me an account to transfer the money into.

The holiday company feel that the problem is with my email account.

I have contacted Norton but they say it is a problem that Outlook need to sort.

Does this mean that someone is able to see everything I type including bank account details, and how do I sort this.

Please help