What
Spam 过滤器使用机器学习在邮件进入您的收件箱之前自动检测并过滤垃圾邮件，提供三个敏感度级别以在保护和误报之间取得平衡。
Why
垃圾邮件会浪费时间，可能包含恶意链接或附件，并使收件箱混乱。智能垃圾邮件过滤器在保护您的同时允许合法邮件通过。
How
Sensitivity Levels
Off
- No automatic filtering: All emails reach your inbox
- Manual control only: You must manually mark spam
- Use when: You prefer complete control or have very low spam volume
Low (Recommended for Most Users)
- Conservative filtering: Only obvious spam is filtered
- Fewer false positives: Legitimate emails rarely get caught
- Local learning: Improves based on your manual spam markings
- Use when: You want protection without aggressive filtering
High (Maximum Protection)
- Aggressive filtering: Catches more suspicious emails
- More false positives: Some legitimate emails may be filtered
- Enhanced detection: Uses advanced pattern matching and sender reputation
- Use when: You receive high volumes of spam or phishing attempts
Configuring Spam Filter
- Navigate to Settings → Privacy → Advanced Features → Spam Filter
- Select your preferred sensitivity level
- The filter applies immediately to new incoming emails
How It Works
The spam filter analyzes multiple factors:
- Sender reputation: Known spam sources are blocked
- Content analysis: Suspicious keywords and patterns
- Link scanning: Detects phishing URLs
- Attachment types: Flags dangerous file types
- Email authentication: SPF, DKIM and DMARC verification
- Your feedback: Learns from emails you mark as spam/not spam
Learning from Your Actions
Enable Learn from my actions to improve filter accuracy:
- Mark emails as Spam: Filter learns to catch similar messages
- Mark emails as Not Spam: Filter learns to allow similar messages
- Continuous improvement: Filter adapts to your specific needs over time
Resetting Spam Learning
If the filter becomes too aggressive or too lenient:
- Navigate to Settings → Privacy → Advanced Features
- Tap Reset spam learning data
- Filter returns to default behavior
- Start fresh with new learning
Additional Spam Controls
Email Authentication Check
- SPF/DKIM/DMARC verification: Validates sender authenticity
- Prevents spoofing: Blocks forged sender addresses
- Recommended: Keep enabled for maximum protection
Identify Unusual Senders
- Detects anomalies: Flags emails from unfamiliar senders
- First-time senders: Alerts you to new contacts
- Impersonation protection: Catches lookalike domains
Show Phishing Warnings
- Real-time alerts: Warns about suspicious links and content
- Visual indicators: Highlights potential threats in email view
- User education: Explains why an email is flagged
Best Practices
- Start with Low: Begin conservatively and increase if needed
- Check Spam folder regularly: Review for false positives
- Train the filter: Consistently mark spam/not spam
- Enable all protections: Use authentication checks and phishing warnings together
- Don't disable completely: Even "Off" allows manual spam marking
Spam Folder Management
- Auto-delete: Spam emails are automatically deleted after 30 days
- Manual review: Check spam folder before permanent deletion
- Recover emails: Move false positives back to inbox
- Empty spam: Manually clear spam folder anytime
