Fight Internet Spam with Free Tools: Rspamd and Beyond
Practical protection for inboxes, mail servers and community websites.
עברית
Less spam, more useful communication
Spam wastes attention and server resources. Some messages also carry phishing links or malicious attachments. Free software gives communities tools they can inspect and operate themselves, but no filter catches every unwanted message without mistakes.
What Rspamd does
Rspamd is a free mail-filtering system integrated with a mail server. It combines multiple signals into scores and actions instead of relying on one suspicious word. It can evaluate reputation, content and authentication. It belongs in the mail delivery pipeline; it is not a browser extension or an automatic filter for website comments.
A careful rollout for administrators
Read the integration guide for your mail server and distribution. Begin by observing classifications, then choose marking, quarantine or rejection policies based on real traffic. Keep a way to recover legitimate messages and review false positives. Protect the management interface and avoid retaining full messages longer than necessary.
Training and authentication
Bayesian filtering needs representative examples of both legitimate mail and spam. Train with reviewed samples rather than teaching the system that all unreviewed mail is spam. DMARC uses SPF and DKIM alignment to apply a domain’s published policy. A successful authentication check does not prove that a message is honest or harmless.
| Tool | Role |
|---|---|
| Rspamd | Mail scoring and filtering |
| Apache SpamAssassin | An alternative free spam-filtering system |
| ClamAV | Malware scanning; complements spam filtering |
| Fail2ban | Log-based blocking of repeated abuse; not a content filter |
Protect your own inbox
Report spam using your mail service’s controls. Separate public contact addresses from sensitive accounts and use aliases where useful. Open the service directly when a message pressures you to sign in or pay. Use unsubscribe for newsletters you recognise; avoid following links in suspicious unsolicited mail. Keep software updated and enable multi-factor authentication.
Forms and comments need their own controls
For a community website we recommend server-side validation, reasonable submission limits, moderation and carefully tested honeypot fields. Provide an accessible route for legitimate visitors. Do not expose a mail relay through a contact form or rely only on JavaScript checks. Review abuse logs and adjust rules when they block real members.