This month’s Ouch! newsletter (PDF) from SANS is about email ‘phishing’ attacks. According to Wikipedia,

Phishing is the act of attempting to acquire information such as usernames, passwords, and credit card details (and sometimes, indirectly, money) by masquerading as a trustworthy entity in an electronic communication.

It’s a worthwhile read, and describes different types of phishing attacks and what you can do to protect yourself from them.