logsat.com

What It Is

SpamFilter ISP is a Windows anti-spam mail server from LogSat LLC, designed to intercept spam and viruses before email reaches a company’s or ISP’s mail server. The page explicitly states that its users include small businesses, enterprises, and internet service providers, and emphasizes its ability to process millions of emails per day without requiring expensive per-user licensing.

Core Capabilities

The product offers a broad range of filtering methods, including the SFDE distributed email address hash database, the SFDB distributed IP blacklist database, the SFDC distributed content database, image spam signature detection, RBL/SURBL, greylisting, Bayesian statistical DNA fingerprinting, SSL and SMTP Authentication, SPF, and user-defined country-based email blocking. SFDE/SFDB works by having SpamFilter ISP installations worldwide report email address hashes or sending IPs found in spam in real time. A centralized database analyzes and blocks them within minutes, then automatically ages out and removes records within 6–24 hours if they stop sending spam or viruses.

Pricing

The page only states that there are no expensive per-user licensing fees and provides a purchase entry point, but it does not disclose specific pricing, editions, subscription terms, or trial policies. As a result, its pricing model can only be considered potentially more favorable for organizations with large mailbox volumes, while actual procurement costs still need to be confirmed with sales.

Pros and Cons

Its strengths lie in the breadth of its filtering technologies, covering traditional blacklists, SPF, and greylisting as well as distributed detection based on real-time community data. It also emphasizes high customizability and high throughput. The limitations are also fairly clear: the main content does not mention compliance certifications, SLAs, centralized reporting, auditing, or alerting capabilities, nor is there any description of integrations with Microsoft 365, Google Workspace, SIEM tools, or cloud platforms. The deployment environment is only explicitly stated as Windows, with insufficient information on modern cloud-native compatibility.

Who It’s For

It is better suited for enterprises or ISPs that still operate their own mail systems, need to deploy a filtering gateway in front of their mail servers, handle large email volumes, and want to avoid per-user fees. If an organization relies heavily on cloud email, security orchestration, compliance auditing, or managed email security services, it should further verify the product’s integration and operational capabilities.

Access in China

The crawled content does not provide information about access from mainland China, node availability, or service availability. This is therefore assessed as unknown.