Spamihilator vs Xeams

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.

Xeams is an email server and spam firewall that can run standalone, sit in front of another mail server, or operate in hybrid mode. It supports SMTP, POP3, and IMAP, alongside email technologies including DKIM, SPF, DMARC, and MTA-STS. Filtering uses sender reputation, authentication checks, attachment and content rules, Bayesian analysis, and virus checks. Administrators use a web interface for live monitoring, logs, reports, retention settings, and tiered administration. Quarantined messages are kept on the server for 15 days by default and can be reached through the web interface or an IMAP client. Integrations include Active Directory and OAuth 2.0 outbound relaying for services such as Microsoft Exchange Online or Google Workspace. Outbound tools include DKIM signing, REST APIs, webhooks, campaigns, read receipts, and header sanitization. A new installation has Enterprise features for 30 days before converting to Community Edition unless licensed. Community Edition is free for up to 5 personal hobby users when spam filtering is used; its spam filtering is otherwise limited to 5 users. Enterprise Edition with Support is $300 a year per deployed instance; Enterprise per-user prices vary by tier.