There seems to be an increase in very good fake e-mails seeming to come from blizzard atm.
Everybody should be extra careful. Losing your account is not fun so check out the Blizz security page: http://us.battle.net/security/checklist.html
“... paranoia can be instructive in the right doses. Paranoia is a skill.”
"We are the ones that want to choose; always want to play but you never want to lose."