It amazes me how many sites allow you to register, and then send you an e-mail to your registered address containing your password in plain-text. There is never a warning stating that the site will email the password you use, for all to see. Sending passwords by e-mail works when you forget a password. ... wants to read it. Sites should seriously consider the security implications of sending passwords by e-mail, especially if there is no prior warning that this will happen!

Just as an experiment, a friend of mine subscribe to ten different opt-in e-mail marketing lists to see which ones are effective. Many websites and online businesses have resorted to sending promotional materials to people who have subscribed to them in an effort to boost their sales or traffic. Opt-in email marketing sends newsletters, ... beg for more. For example, if you are selling a car, provide them photos but only enough to encourage them to go to your site for more.