Thousand of dead mails in mail.box!

There are thousand of dead mails in my mail.box. This is the 3rd time i received this kind of email and i have no way to block it. The dead mail looks like this:

From: “Abbey National plc” message.center@abbey.co.uk

Recipients: message.center@abbey.co.uk

Subject: You Have 1 Unread Message

Date: 07:09:00 AM Today

Failure Report

Intended Recipient: agorka@socsci.soton.ac.uk

Failure Reason: 550 5.1.1 agorka@socsci.soton.ac.uk… User unknown

Dead Failure Reason: 550 #5.1.0 Address rejected message.center@abbey.co.uk

Any way to block this?