Spamsieve 2.9.51 May 2026

When used with Apple Mail, the background launch agent now correctly identifies itself as "SpamSieve" rather than "C-Command Software" in System Settings.

SpamSieve 2.9.51 is a maintenance update for the long-standing Bayesian spam filtering utility for Mac, released in January 2023. While it is now a legacy version—succeeded by major versions like —it remains a highly effective choice for users on older macOS versions. Key Features and Performance SpamSieve 2.9.51

Unlike server-side filters, all processing is done locally on your Mac; the app does not require access to your login credentials or transmit your mail data elsewhere. When used with Apple Mail, the background launch

This specific update introduced minor but useful refinements for users on newer systems at the time: Key Features and Performance Unlike server-side filters, all

Version 2.9.51 supports macOS from 10.13 High Sierra up to macOS 13 Ventura. It integrates with numerous clients including Apple Mail, Outlook, Airmail, and MailMate.

By running SpamSieve on a Mac that stays on, it can filter spam for your iPhone and iPad by cleaning the server-side inbox before your mobile devices fetch the mail. What's New in 2.9.51