Email Risk Score

What is an Email Risk Score?

An email risk score is a numeric value assigned to an email address based on multiple signals that indicate how likely the address is to be fraudulent, disposable, or problematic. It combines the results of various validation checks into a single, actionable number.

Rather than making a binary valid/invalid decision, risk scoring gives you a spectrum — allowing you to set your own threshold based on your business's risk tolerance. A financial services company might reject anything above 50, while a content site might only block scores above 80.

Factors in Risk Scoring

• Disposable email domain — Major risk factor. Known throwaway email services score very high.
• Domain age — Newly registered domains are more likely to be used for spam or fraud.
• MX record quality — Unusual or suspicious mail server configurations increase risk.
• Free provider — Free email addresses (Gmail, Yahoo) carry slightly higher risk than corporate addresses in B2B contexts.
• Role-based address — Group addresses like info@ or admin@ are riskier for marketing.
• Syntax anomalies — Unusual characters, excessive length, or patterns associated with auto-generated addresses.
• Historical data — Has this domain or address appeared in spam traps, fraud databases, or complaint lists?

Using Risk Scores

Risk scores enable tiered decision-making. Instead of a blanket accept/reject, you can route users through different flows: low-risk addresses get instant access, medium-risk might require email confirmation, and high-risk addresses are blocked or flagged for manual review.