SpamFilter for ISP

Spam is one of those unintended negative side effects produced by technological progress with which everyone has to deal on a daily basis. Fortunately, most mail servers employ complex and advanced protection algorithms to filter relevant messages from the millions of mails received.

SpamFilter for ISP is just one such tool that helps SMTP servers handle spam in an efficient way. The program is tailor-made for ISPs, enterprises and similar large-scale operations and is, therefore, not intended for end-users. In essence, the software creates a spam filter gateway, which prevents most unsolicited mail from reaching casual users.

The application features a somewhat complex and multi-tiered interface, based on multiple tabs. As with most programs that monitor network activity, most of the GUI objects deal either with reports and statistical information, or with the actual settings involved in running the application. Although the “Settings” tab is comprehensive and requires a significant amount of users' attention and time, once the software is configured, the program runs smoothly and unobtrusively.

SpamFilter for ISP's strength lies in its filters. There are multiple such tools employed by the program, including a "Spam Filter Database", as well as a "Spam Filter Distributed Content Database". These complementary components analyze emails and create unique hashes that constitute the basis for a real-time, constantly updated database.

The spam gateway also scans attachments, including images embedded in PDF documents, and a memory function allows DNS-based block lists to be created. Bayesian statistical analysis is also employed to fine-tune results and ensure most spam messages are captured.

All things considered, SpamFilter for ISP is a great solution for SMTP servers faced with millions of spam messages every day.