Anti-Spam for Linux

Ultimate spam protection

• 24/7 DNS-based Blackhole List protection from spam
• SPF and SURBL filtration technologies
• Scanning of messages using linguistic heuristics and signature-based analysis
• Easy central administration with detailed reports
• Certified by Novell, Westcoast Labs and ICSA Labs Downloads
  • Leaflet
  • Whitepaper
  • Anti-spam evaluation guide
  • Anti-spam SDK

Protection from Spam

Sender IP addresses are checked against blacklists of spammers, which are maintained by Internet service providers and public organizations (DNS-based Blackhole Lists). System administrators can add addresses of trusted correspondents to a safe list, ensuring that their messages are always delivered without undergoing filtration.

The filtration process also involves verifying senders using the Sender Policy Framework. Detection of spammer IP addresses using DNSBL is supplemented by SURBL technology (Spam URI Real-time Block List), which can identify spam URLs in the message body.

The program recognizes spam by such typical characteristics as distorted sender addresses or the absence of the sender’s IP address in DNS, an excessive number of intended recipients or hidden addresses. The size and format of messages are also taken into consideration.

Lexical signature databases are updated around the clock. Using spam signatures, the program can even recognize modified versions of spam messages that have been altered to evade spam filters.

The program scans messages for words and phrases that are typical of spam messages. Both the content of the message itself and any attachments are analyzed.

A database of signatures for graphic spam equips the program to block messages containing spam images, a type of spam that has become increasingly common in recent years.

The Urgent Detection System is updated with information on spam messages literally seconds after they first appear on the Internet. Messages that could not be assigned a definitive status (e.g., spam, no-spam) can be scanned using UDS.

Administration

Our web interface allows system administrators to manage the application both locally and remotely. The filtration level is easily configurable, as are blacklists and safe lists. It is also possible to disable/enable individual filtration rules and automatically block mail encoded in Asian language sets.

The administrator can create user groups either using lists of addresses or domain masks (for example, XXX@domain.com) and apply individual settings and filtration rules to each group.

The program can be configured to process spam by either automatically deleting it, redirecting it to the quarantine folder with a note to the user or sent for further filtration to the mail client.

Administrators can easily monitor the application, the protection status and license status, using HTML reports or alternatively, by viewing log files. Data can be exported in CSV and Excel formats.

Updates to antivirus databases can be downloaded on a schedule set by the administrator (by default they update every 20 mins). When undecided about the status of a suspicious message, the program also makes requests to the UDS server.