SpamSieve
SpamSieve is a Mac email spam filter that learns from your messages to separate junk mail from legitimate mail in supported mail apps.
What is SpamSieve?
SpamSieve is a native Mac spam-filtering app for email. It helps users reduce junk mail by learning from examples of good and unwanted messages, then applying that training to future mail in supported mail programs. The app is aimed at people who want more control and accuracy than a basic built-in junk filter can provide, especially if they manage high volumes of email. Common uses include improving Inbox cleanup, correcting false positives, and training the filter over time so it better matches a user's own mail patterns. SpamSieve also provides setup guidance for supported mail apps and stores local training data and preferences so your filtering behavior can be preserved across backups or Mac migrations. It is published by C-Command Software, LLC for macOS.
Key features
- Filter spam in supported Mac mail apps
- Learn from good and junk messages over time
- Let you correct mistakes by retraining messages
- Work with setup instructions for different mail programs
- Preserve training data for backup or migration
- Support local preference and training management on macOS
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Safety overview
Status: Mostly safe
SpamSieve is legitimate email-filtering software, and access to your mail is a normal part of how it works. Because it analyzes message content and stores training data locally, treat it like any app that handles sensitive email and keep your Mac backups protected. If you stop using it, your mail program may lose the filtering behavior and training you built up over time.
Recommendation: Keep SpamSieve if you rely on it to filter junk mail or have trained it with your own messages. Remove it only if you no longer use it and do not need its saved filtering history, since uninstalling it can interrupt the spam-filter workflow in your mail setup.
Common paths
/Applications/SpamSieve.app
Support paths
~/Library/Application Support/SpamSieve
Preference paths
~/Library/Preferences/com.c-command.SpamSieve.plist
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