A Phishing page emulates a well known trusted website and tries to capture (phish) your login data for the original website. Most phishing incidences start with mass emailing potential victims. The mail looks like an exact copy of a mail send by the original site with the only difference that a url is provided that is most of the time slightly different from that of the original site.
Anatomy of a failed virus attack
Jim Kissel of Open Source Migrations Limited wrote a nice article about a malicious email attack he encountered recently. He analyzes the email received and gives tips to secure Thunderbird, the free email program they use.

