The following was posted on the SpamSieve blog:

Version 2.9.30 of SpamSieve is now available. This is a free update that includes the following changes:

  • SpamSieve is now 64-bit only and requires macOS 10.7 or later.
  • Made various changes to improve SpamSieve’s filtering accuracy.
  • You can now click the Outlook - Filter Mailboxes icon in the Dock to make it filter the new inbox messages immediately instead of waiting until the next scheduled check.
  • The Apple Mail - Remote Training script now auto-creates the TrainGood and TrainSpam mailboxes for you.
  • Added the Apple Mail - Block Sender script.
  • Improved the following sections of the manual:

  • SpamSieve can now recover from certain types of damage to a Rules file by logging information about the damaged rules and modifying them so that they don’t cause crashes.
  • Manually installing the Apple Mail plug-in now forces creation of a new launch agent .plist file, even if nothing has changed, to work around a problem with it not loading.
  • The Apple Mail - Remote Training, Apple Mail - SaneBox, and Apple Mail - Server Junk Mailbox scripts work around a macOS bug that reports that System Events is not running.
  • Outlook - Filter Mailboxes now works around an Outlook bug with getting folders by name.
  • Improved the error reporting when a file cannot be written.
  • Fixed a bug where SpamSieve could be fooled into parsing the wrong e-mail address out of a message header (Mailsploit).
  • Fixed a bug where a misleading error message would be presented if a secure connection could not be made to the software update server.
  • Fixed a spurious error in diagnostic reports on macOS 10.12 and later.
  • Made various code modernizations.
  • Updated the German localization.

SpamSieve 2.9.30 works with macOS 10.7 through 10.13 and requires an e-mail client. Older versions are available for older operating systems. For information about previous releases of SpamSieve, please see the version history.