Keep Getting E-mails To Upgrade Account

Dear Bellsouth, I keep getting this e-mail sighted below.  Is this legitimate and why do they want this information.  Don't you already have this info???  F-Secure is a virus protection program that you have buy I think.  What's going on here? MDC HERE'S THE E-MAIL Dear Bellsouth Account User,Your e-mail needs to be updated with our released F-Secure Internet Security 2011 new version of a better resource webmail spam and viruses. If you have not upgraded your account, click reply and fill in the columns below to send it back so we can update our database account immediately. Failure to update will process your Bellsouth account being temporarily blocked or suspended from our network and may not be able to receive or send e-mail due to the update.Fill the column below:USERNAME: PASSWORD: Phone:We apologize for the inconvenience, we are here to make it look better webmail in 2011.Bellsouth Customer Care!Case Number: 7650087 PropertyAccount Security©2011 Bellsouth All Right Reserved.