Email spam

 Email spam

Email spam today is sent via (zombie network) networks of virus- n worm-infected personal computers in offices and home's around globe. Many modern worms install backdoor which allows spammer to access the computer and use it for malicious purpose.This complicates attempt to control the spread of spam. In many cases the spam doesn't originate from  spammer. In November 2008 an ISP McColo which was providing service to botnet  was depeered and spam dropped 50%-75% Internet-wide. At the same time, becoming clear that malware author's publisher's and spammers are learning from each other possibly forming various kinds of partnership.
 also known as unsolicited bulk Email junk mail, or unsolicited commercial email UCE is the practice of sending unwanted email messages commercial content, in large quantities to  indiscriminate set of recipients. Spam in email started to become problem when the Internet opened up to the general public in the mid-1990s. It grew exponentially over following years, and today composes some 80 to 85% of all the email in the world, by  'conservative estimate'.Pressure to make email spam illegal has been successful in some jurisdictions, but less so in others.Spammers take advantage, and frequently outsource parts of their operations to countries where spamming will not get into legal trouble.
An industry of email address harvesting dedicated to collecting email addresses and selling compiled databases. Some of these address harvesting approaches on users not reading the fine print of agreements, resulting in agreeing to send messages indiscriminately to their contacts. This is a common approach in social networking spam such as generated by social networking site Quechup.