Email Verification

Email verification validates email addresses and assesses their risk level based on multiple factors including deliverability, domain reputation, and fraud signals.

Email Verification Process

┌─────────────────────────────────────────────────────────┐
│                  EMAIL ADDRESS                           │
└─────────────────────────┬───────────────────────────────┘
                          │
            ┌─────────────┼─────────────┐
            │             │             │
            v             v             v
      ┌──────────┐  ┌──────────┐  ┌──────────┐
      │ Syntax   │  │ Domain   │  │ Mailbox  │
      │ Check    │  │ Check    │  │ Check    │
      └────┬─────┘  └────┬─────┘  └────┬─────┘
            │             │             │
            v             v             v
┌─────────────────────────────────────────────────────────┐
│                RISK ASSESSMENT                           │
│    Domain age, reputation, fraud history, patterns       │
└─────────────────────────┬───────────────────────────────┘
                          │
                          v
┌─────────────────────────────────────────────────────────┐
│         VERIFICATION RESULT + RISK SCORE                 │
└─────────────────────────────────────────────────────────┘

Verify an Email

API Request

curl -X POST https://api.bytrustgate.com/v1/email/verify \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "email": "john.doe@example.com",
    "applicant_id": "550e8400-e29b-41d4-a716-446655440000"
  }'

Response

{
  "email": "john.doe@example.com",
  "verification": {
    "status": "valid",
    "deliverable": true,
    "syntax_valid": true,
    "domain_valid": true,
    "mailbox_exists": true
  },
  "risk_assessment": {
    "risk_score": 25,
    "risk_level": "low",
    "factors": []
  },
  "metadata": {
    "domain": "example.com",
    "domain_age_days": 8500,
    "is_free_provider": false,
    "is_disposable": false,
    "is_role_account": false,
    "is_catch_all": false,
    "mx_records": true
  }
}

Verification Statuses

Status	Description	Recommendation
valid	Email is valid and deliverable	Accept
invalid	Email is invalid	Reject or request new
risky	Email exists but has risk factors	Review
unknown	Unable to verify mailbox	Allow with caution

Risk Factors

High Risk

Factor	Risk Contribution	Description
disposable_email	+30	Temporary email service
known_fraud_domain	+40	Domain associated with fraud
spam_trap	+50	Known spam trap address
recently_created_domain	+20	Domain < 30 days old

Medium Risk

Factor	Risk Contribution	Description
free_provider	+5	Gmail, Yahoo, etc.
catch_all_domain	+10	Domain accepts all addresses
role_account	+10	Generic addresses (info@, admin@)
no_mx_records	+15	Domain can't receive email

Low Risk

Factor	Risk Contribution	Description
new_email	+5	No history of this email
unusual_tld	+5	Uncommon top-level domain

Disposable Email Detection

Common Disposable Providers

TrustGate detects 10,000+ disposable email providers including:

• 10minutemail.com
• guerrillamail.com
• tempmail.com
• throwaway.email
• mailinator.com
• And many more...

Response for Disposable Email

{
  "email": "user@tempmail.com",
  "verification": {
    "status": "risky",
    "deliverable": true
  },
  "risk_assessment": {
    "risk_score": 75,
    "risk_level": "high",
    "factors": [
      {
        "factor": "disposable_email",
        "contribution": 30,
        "details": "tempmail.com is a known disposable email provider"
      },
      {
        "factor": "recently_created_domain",
        "contribution": 20,
        "details": "Domain created 15 days ago"
      }
    ]
  }
}

Email Domain Intelligence

Get Domain Information

curl -X GET "https://api.bytrustgate.com/v1/email/domain/example.com" \
  -H "Authorization: Bearer YOUR_API_KEY"

Response

{
  "domain": "example.com",
  "domain_age_days": 8500,
  "registrar": "Example Registrar Inc",
  "mx_provider": "Google Workspace",
  "spf_record": true,
  "dkim_record": true,
  "dmarc_record": true,
  "is_free_provider": false,
  "is_disposable": false,
  "is_corporate": true,
  "company_name": "Example Corporation",
  "risk_score": 10,
  "applications_from_domain": 25,
  "fraud_rate_from_domain": 0.02
}

Workflow Rules

Block Disposable Emails

curl -X POST https://api.bytrustgate.com/v1/workflows/rules \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "rule_id": "block_disposable_email",
    "trigger": "email_verified",
    "conditions": {
      "all": [
        {"field": "email_is_disposable", "operator": "eq", "value": true}
      ]
    },
    "actions": [
      {
        "type": "update_status",
        "status": "pending_review"
      },
      {
        "type": "request_info",
        "info_needed": "Please provide a permanent email address"
      }
    ]
  }'

Flag Free Email Providers

curl -X POST https://api.bytrustgate.com/v1/workflows/rules \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "rule_id": "flag_free_email",
    "trigger": "email_verified",
    "conditions": {
      "all": [
        {"field": "email_is_free_provider", "operator": "eq", "value": true},
        {"field": "applicant_type", "operator": "eq", "value": "business"}
      ]
    },
    "actions": [
      {
        "type": "add_flag",
        "flag": "personal_email_for_business"
      }
    ]
  }'

Email Verification Settings

Configure Email Checks

curl -X PUT https://api.bytrustgate.com/v1/settings/email-verification \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "verify_on_submit": true,
    "block_disposable": true,
    "flag_free_providers": true,
    "require_corporate_for_business": true,
    "risk_thresholds": {
      "auto_accept": 30,
      "manual_review": 60,
      "auto_reject": 85
    }
  }'

Bulk Email Verification

Verify Multiple Emails

curl -X POST https://api.bytrustgate.com/v1/email/verify/bulk \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "emails": [
      "user1@example.com",
      "user2@company.org",
      "user3@tempmail.com"
    ]
  }'

Response

{
  "results": [
    {
      "email": "user1@example.com",
      "status": "valid",
      "risk_score": 15
    },
    {
      "email": "user2@company.org",
      "status": "valid",
      "risk_score": 10
    },
    {
      "email": "user3@tempmail.com",
      "status": "risky",
      "risk_score": 75
    }
  ],
  "summary": {
    "total": 3,
    "valid": 2,
    "risky": 1,
    "invalid": 0
  }
}

Email Deduplication

Find Duplicate Applications

curl -X GET "https://api.bytrustgate.com/v1/email/duplicates?email=john.doe@example.com" \
  -H "Authorization: Bearer YOUR_API_KEY"

Response

{
  "email": "john.doe@example.com",
  "applications": [
    {
      "applicant_id": "app_001",
      "status": "approved",
      "created_at": "2024-06-15"
    },
    {
      "applicant_id": "app_002",
      "status": "pending",
      "created_at": "2025-01-20"
    }
  ],
  "similar_emails": [
    {
      "email": "johndoe@example.com",
      "similarity": 0.95,
      "applicant_id": "app_003"
    }
  ]
}

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Next Steps

• Phone Verification - Phone number validation
• Device Intelligence - Device risk assessment
• Risk Signals - All fraud signals