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SpamSieve
Save time by adding powerful spam filtering to the e-mail client on your Mac. 
- Requires: macOS 10.9 through 11.0 and an e-mail client (older versions available).
- Recommended: IMAP or Exchange mail account (for iPhone/iPad spam filtering).
- See what’s new in version 2.9.40 (released October 19).
| “SpamSieve is just incredibly, amazingly accurate; my In box is clean, baby, clean!” David Pogue, The New York Times |
“Best email spam filter for the Mac, period.” John Gruber, Daring Fireball |
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SpamSieve gives you back your inbox, using powerful Bayesian spam filtering to provide amazing accuracy that’s constantly improving. Works with IMAP, Exchange, and POP mail accounts. |  |
It’s quick and easy to control SpamSieve from within Apple Mail (Mail.app), Airmail, Entourage, MailMate, Mailsmith, Outlook, Postbox 5, PowerMail, and more. |
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SpamSieve learns and adapts to your mail, so it’s able to block nearly all the junk—without putting good messages in the spam mailbox. |  |
Turn off new-mail notification in your e-mail client and let SpamSieve notify you only when you receive new non-spam messages. |
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Automatically maintains a whitelist to guarantee that messages from previous correspondents are never marked as spam. |  |
Integrates with your contacts so that messages from friends and colleagues always make it through to your inbox. |
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Maintains a blocklist so that it can instantly stop the spam messages sent from particular addresses and catch 100% of them. |  |
Customize the whitelist and blocklist by adding your own rules. Use a variety of criteria, e.g. regular expressions, to match different message parts. |
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Spammers encode and obfuscate their messages and use phishing tactics, but SpamSieve can decode the messages to discern their true nature. |  |
SpamSieve looks inside attached images and documents to detect spammy content even when the message itself is virtually empty. |
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Colors show how spammy each message is, so you can quickly focus on the borderline ones if you want to check SpamSieve’s work. |  |
SpamSieve keeps track of how accurate it is, how many good and spam messages you receive, and how these numbers change over time. |
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SpamSieve preserves your privacy. It does not need access to your mail account login and does not transmit your mail data anywhere. All the processing is done on your Mac. |  |
SpamSieve running on your Mac can keep the spam off your iPhone/iPad, and you can even train SpamSieve from afar. |
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The log lets you see everything that SpamSieve did, and why, so that you can tweak the settings if necessary. |  |
There are lots of optional AppleScripts for deeper customization and integration with mail clients and services. |
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Rescue good messages caught by a server junk filter. |  |
For more information, please see the feature list, screenshots, or the extensive user manual. |
