We have all had them ,an e mail that is from some company / bank , that tells you that you need to log in and enter your account details including your password.
DO NOT DO IT
It is all about getting your details and password and can lead to identity theft , trojans being installed , virus's being installed , worms being installed etc.
These companies and lets include banks and any financial institution DO NOT send these e emails out
If you look at the example underneath from the one I have received which claims to be from Yahoo ( it's not Yahoo ) , my marketing account has supposedly expired ( it hasn't )
Do not respond to these just delete them and save yourself the trouble.