I get similar but from Amazon, it had me going for a few mins till I saw the e-mail address they'd sent it to (mine) when I'm not the nameholder for our Amazon account, that got me wary.
The e-mail says we're 'moving our server'/'upgrading our security' and that you have to click this link and log-on, the page looks authentic with a credible address like
www.amazon-securty.co.uk or something like that. I did log-on to this page one day but with swear-words for a password/e-mail address (bleep@bleeper.co.uk) and passed through to a 2nd page which wanted name, rank and serial number. Actually, the question field was THAT extensive, it actually wanted things right down to mothers maiden name, tel No,
all the useful stuff a data theif would find useful to create accounts or get paperwork in your identity.
I also 'Who Is'ed the server address and that's how I sussed it definitely wasn't genuine.
I just pass them on to Amazon.
p.s I also filled in this extensive form one day with the usual 'anglo saxon stuff', submitted it and was briefly thanked before they dropped me as once you submit your data, they have what they want.
Having been through it, I can see how easily it would be to be taken in, indeed, one e-mail from my ISP had me going once... it was the above 'upgrading our servers and if you have multiple accounts, log-on and use them or loose them' type of message. What saved me was my laziness as we have a few and it'd have meant getting a load of addresses and passwords together. hat was a close one...