SpamSieve is a robust spam filter for major email clients that uses powerful Bayesian spam filtering.
SpamSieve understands what your spam looks like in order to block it all, but also learns what your legitimate messages look like to avoid confusion. SpamSieve only marks spam in your email client so you never lose any mail.
Works with Apple Mail under Mac OS X 10.11 El Capitan. It’s easiest if you update to SpamSieve 2.9.21 before updating to El Capitan. In any case, if you don’t see the SpamSieve commands in Apple Mail’s Message menu, be sure to choose Install Apple Mail Plug-In from the SpamSieve menu. Otherwise, with the SpamSieve plug-in not installed, Mail will move good messages to the spam mailbox without consulting SpamSieve.
Made various changes to improve SpamSieve’s filtering accuracy.
Microsoft Outlook 2016 removes the Run AppleScript rule action feature. This makes it impossible to create a rule that automatically processes incoming messages with SpamSieve. We recommend using the "send-a-smile" button in Outlook’s main window (below the search field) to send Microsoft feedback, asking them to prioritize this feature. Please see this forum post for more information and workarounds for using SpamSieve with Outlook 2016.
Added the Outlook - Filter Mailboxes script as a workaround for automatically filtering messages with Outlook 2016.
Added support for App Transport Security on Mac OS X 10.11.