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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.

What's New

Version 2.9.29:
  • Works with Apple Mail under macOS 10.13 High Sierra (currently in beta)
  • Made various changes to improve SpamSieve’s filtering accuracy
  • Made various improvements to the Outlook - Filter Mailboxes app for Microsoft Outlook 2016:
    • The Setting Up Outlook 2016 section of the manual has been updated to be more complete and clear
    • Worked around a


  • OS X 10.6.8 or later
  • Works with:
    • Apple Mail
    • Airmail
    • Emailer
    • Entourage
    • Outlook 2011
    • Outlook Express
    • Eudora 5.2 or 6.x (Sponsored or Paid)
    • MailForge
    • MailMate
    • Mailsmith
    • GyazMail
    • Postbox
    • PowerMail
    • Thunderbird 2

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SpamSieve User Discussion

4.6 124


Current Version (2.x)


Downloads 164,785
Version Downloads 1,079
License Shareware
Date 25 Aug 2017
Platform Intel 64 / OS X / Intel 32
Price $30.00
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