spamsieve

Install command: 
brew install --cask spamsieve

Name: SpamSieve

Spam filtering extension for e-mail clients

https://c-command.com/spamsieve/

Cask JSON API: /api/cask/spamsieve.json

Cask code: spamsieve.rb on GitHub

Current version: 3.2.1

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
spamsieve 35
Installs (90 days)
spamsieve 66
Installs (365 days)
spamsieve 257