MI Shield (AI-Enforced Protection)
What is MI Shield?
MI Shield is Mission Inbox's proprietary AI pre-send spam filter. It is a firewall that scans content, headers, and DNS before any email leaves the system. If an email looks like spam, MI Shield blocks it before it is sent, saving your domain from burning.
How MI Shield Works
MI Shield has been trained on 100M+ fully consented emails. It analyzes every outbound email before it is sent and:
- Prevents messages that would trigger spam filters
- Prevents throttling
- Prevents blacklisting
- Continuously learns from inbox placement outcomes
- Adapts as Google and Microsoft evolve their filtering systems
Analysis Speed
- <50ms analysis time per email
- Zero impact on sending speed
- 24/7 real-time protection
Key Capabilities
1. Pre-send Enforcement
- Prevents damage instead of reacting to it
- Traditional spam filters react after damage is done
- MI Shield analyzes and blocks risky emails BEFORE they cause reputation damage
2. Content Analysis
- Scans subject lines for spam triggers
- Analyzes email body for problematic language
- Checks HTML/text ratio
- Validates links and URLs
3. Header Validation
- Ensures proper From/Reply-To headers
- Validates authentication headers (SPF, DKIM, DMARC)
- Checks for spoofing indicators
4. DNS Validation
- Confirms sender domain is properly authenticated
- Checks MX records
- Validates DMARC policy
5. Reputation Protection
- Real-time blacklist monitoring
- Automatic throttling when reputation dips
- Proactive alerts before issues escalate
MI Shield vs. Traditional Filters
Feature | MI Shield | Traditional Filters |
|---|---|---|
When it acts | Before sending | After sending |
Damage prevention | Yes | No |
AI-powered | Yes | No |
Continuous learning | Yes | Static rules |
DNS validation | Yes | No |
Integration
MI Shield is built into every Mission Inbox Cube by default. There is no setup required — it protects every email automatically.
API Control
Developers can:
- Query MI Shield scores via API
- Set custom thresholds per workload
- Review blocked email logs
- Whitelist trusted senders
Shield Levels
Level | Description | Best For |
|---|---|---|
Standard | Balanced protection | Most senders |
Strict | Higher threshold | Cold email, high-volume |
Custom | Configurable rules | Enterprise |
Reporting
The MI Shield dashboard shows:
- Emails analyzed vs. blocked
- Block reasons breakdown
- Trend over time
- Top blocked content patterns
Updated on: 27/02/2026
Thank you!