ISPs ratcheting up their anti-spam efforts

摘要

As the spam epidemic continues to worsen, ISPs are taking on a more leading role in trying to stop unwanted e-mail from reaching corporate networks and consumer in-boxes. Although a few ISPs have offered anti-spam services for years, many are just starting to roll out their offerings. These anti-spam services range from server filters that ISPs use to capture spam intended for their customers, to managed services that those providing e-mail hosting have added to their lineups. "Because ISPs can capture traffic at the aggregation points and cleanse the traffic prior to it being sent on to the customer, it makes more efficient use of their network" to use anti-spam filters, says Michael Suby, a senior research analyst at Stratecast."In some regards it's self-serving, but in a good way On the inbound they're catching traffic they don't have to pass through ... so they're reducing their network requirements and also serving their customers."