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.
This specific update introduced minor but useful refinements for users on newer systems at the time: SpamSieve 2.9.51
The core "trick" of SpamSieve is its ability to learn from your specific email habits. Reviewers consistently report accuracy rates of 99% or higher after a brief training period. Version 2
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 Reviewers consistently report accuracy rates of 99% or
When used with Apple Mail, the background launch agent now correctly identifies itself as "SpamSieve" rather than "C-Command Software" in System Settings.
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.
Improved error messaging for AppleScript failures during training. User Sentiment C-Command Software Blog - SpamSieve 2.9.51