Recently, a new trend has begun to develop among spammers. To remain competitive, many small hosting companies can now register free sub-domains and hosting packages offer complementary. Spammers have found a new tactic: it takes longer to filter spam before it detects spam messages are sent via a website newly infected as opposed to sites that have existed for a long time and know a legitimate traffic. This time difference allows them to generate billions of spam messages that are sent using a botnet and make a fortune.
|