Spam Filter for ISPs

Spam Filter for ISPs is designed to be a front-end for your incoming SMTP server. Spam Filter for ISPs is a spam filter gatewayIt receives all emails addressed to your domain(s) and checks if the sender is listed in one or multiple DNS-based block lists; if not, the email is passed on to your main SMTP server.

The administrator can configure which block lists to use, set allowed domains, filter by keyword and maintain a blacklist as well.

- SFDB - SpamFilter Distributed Blacklist
- MAPS DNS RBL Filters
- SURBL Filters
- SPF - Sender Policy Framework
- Bayesian Statistical Filtering
- Image Scanning / Filtering
- Blacklist IPs
- Blacklist Domains
- Blacklisted FROM Emails
- Blacklisted TO Emails
- Blacklist by Country
- Honeypot Capabilities
- Attachment Blocking
- Keywords Filter
- Reverse DNS validation
- MX Record validation
- Reject if "Mail From" = "Mail To"
- Reject if "From Domain" = "To Domain"
- Whitelist Domains / IPs
- Deliver specific emails without filtering
- Whitelist FROM Emails
- List of "Authorized TO Emails"
- SMTP User Authentication with SSL support