A phishing-mail is an e-mail with the sole purpose of trying to fish personal information from you, like username and password to an e-mail account, bank account, etc. It might also cut straight to the point and try to lure your credit card details by convincing you to enter them on a site, or something “bad” might happen to your e-mail account or stuff like that.
The spamfilter at TDC catches between 300 and 500 million e-mails every month, but it also catches phishing-mails. It’s said that 1 out of 300 e-mails sent on the Internet is a phishing mail. Studies show that users are more inclined to react (get caught) on a phishing-mail rather than ordinary spam. That explains why we are seeing more and more phishing e-mails.