But while such new products show that software makers are getting aggressive about stopping junk e-mail, Internet experts say technical fixes might not be enough. The Internet was originally built on open systems and trust. The software incorporates a variety of filtering tools, including a way to automatically check messages against a constantly updated list of known spammers, and throw out the ones that match. Add your comments to the bottom of this page. It can also double-check the validity of a sender's address, and reject a message originating from a fake address.
Spammers often forge their return addresses, in order to avoid retaliation from angry recipients.
Fighting spam 48 ways BSDI's MailFilter is aimed at corporations and ISPs who want to keep spam off their mail servers. The stand-alone box sits between the company's router and its server. You set it up and you never have to mess with it again. And it has no other interactions with other pieces of software, so it's very easy to use. The program is sophisticated enough to recognize and reject spam before the user downloads it, saving time and bandwidth.