Barclays bank nuisance mails e day - how do i stop them?details added at ~2.next?

Subject: barclays bank - plz update your details wed.27 dec 2006 16.1152 barclays bank plc _operate-_ref969661b@barclays.com_ reference-id 444131014401643ib@barclays.com_ message-id:_272092.96930.qm@web86609.mail.ird.yahoo.com_ barclays bank - _emea_id_018794168876967ib@barclays.com_ i am not a barclays bank customer or employee; i have never been a barclays bank customer or employee; i do not intend to be a barclays bank cusomer of employee. . from: mailer-daemon@yahoo.com subject: failure notice
Answer
They are con emails they are sent out to thousands of people , and what they are hoping for some one will give their details and that is what they want to do bad things. as for mailer daemon that is when the emails that you send to is incorrect if you misspell an email that is what you get back so when you get that check the spelling of you email that you have sent to