# Email Deliverability Test

The Email Test feature analyzes a real email message to determine why it may fail delivery or land in spam.

Unlike DNS-only tools, this test inspects both authentication and message-level signals.

## What It Analyzes

- SPF result
- DKIM signatures
- DMARC alignment
- Header consistency
- Message structure
- Suspicious content patterns
- Sending domain reputation

## Input

Users submit:
- A raw email (full MIME source)
- Or forward a test message to a generated address

## Output

The result includes:
- Authentication verdicts
- Deliverability score (A–F)
- Human-readable explanation
- Actionable remediation steps

## Common Issues Detected

- Missing DKIM signatures
- SPF lookup limit exceeded
- DMARC misalignment
- Mismatched From and Return-Path domains
- Blacklisted sending IPs
- Poor HTML/text ratio

## Typical Use Cases

- Debugging why campaigns land in spam
- Validating transactional email setup
- Verifying changes before large sends