Rspamd vs Spamihilator

Rspamd is an email security engine for filtering phishing, business email compromise, malicious attachments, and spam. It scores messages using reputation, sender authentication, content analysis, and machine learning. Authentication checks cover SPF, DKIM, DMARC, and ARC; malware scanning can use ClamAV or commercial antivirus engines. Administrators can define custom rules through the Lua API and configurable maps and selectors. Rspamd works with mail transfer agents including Postfix, Exim, and Sendmail, and its ClickHouse and Elasticsearch integrations provide visibility into attack patterns and detection rates. It is designed for gateway deployment and can run on-premises, keeping message data in the operator's environment without a mandatory vendor cloud. The detection engine is open source under Apache 2.0 and is available for Linux, macOS, and self-hosted use. Rspamd says its event-driven C core scans hundreds of messages per second per core and can scale from a single server to billions of messages a day. The open-source engine is listed at free. Scale costs £100 a month, with 5K mailboxes; hosted and enterprise plans have custom pricing. Premium plans offer support from core engineers, with enterprise SLA options.

Spamihilator is a free Windows program positioned between an email client and the Internet to filter incoming unsolicited mail. Its Learning Filter uses Bayesian filtering, and the site says it recognizes more than 98% of spam mails. Built-in Spam Word, Link, DCC, and Rule filters can be supplemented with custom words and regular expressions. The program works with POP3 and IMAP clients, including Outlook and Mozilla Thunderbird, and uses SSL/TLS when supported by the mail server. Recognized spam is held in a Recycle Bin for restoration, and users can train the filter with spam and non-spam messages. An option can delete messages from blocked senders directly on the server before download. Plugins and add-ons can extend filtering or add functions, including DNS blacklist and SpamAssassin-header examples. The download page lists version 1.7 dated June 5, 2022, in 32-bit, 64-bit, and portable builds; not all plugins work with 64-bit. English and German are included, with a language pack adding over 30 languages.