How should I handle catch-all emails?

Use risk scoring instead of binary accept/reject.

Catch-all domains accept all emails, so validation can't confirm if a specific address exists. Binary accept/reject loses good leads or causes bounces.

Risk scoring factors:

• Email pattern: firstname.lastname = lower risk, random_string = higher risk
• Domain signals: Fortune 500 = lower risk, new domain = higher risk
• Role-based: info@, sales@ = risky

Risk score thresholds:

• 0.0-0.3: Safe to send without hesitation
• 0.3-0.5: Send to warmed domains only
• 0.5-0.7: Send only if high-value lead
• 0.7+: Skip entirely

Segmented sending strategy:

• Push "safe" catch-alls to main campaigns
• Push "moderate" catch-alls to a separate test campaign with daily limit of ~20
• Skip "risky" catch-alls entirely