Beyond Verification. True Email Intelligence.
Most email verification tools tell you if a mailbox exists. Postmaster+ goes further — combining real-time verification with engagement scoring and data enrichment to give you a complete picture of every email address in your database.
Three Layers of Intelligence
Email Verification
Real-time validation that goes beyond syntax checking. Postmaster+ verifies DNS records, MX configuration, and mailbox existence to determine if an email address can actually receive mail. We detect disposable email providers, role-based addresses (info@, support@), and catch-all domains that accept any address.
Engagement Scoring
A verified email doesn't mean an engaged subscriber. Our engagement scoring uses historical behavioral signals — recency, frequency, and type of activity across billions of monthly signals — to predict whether someone actually reads their email. The 0–10 activity score helps you prioritize outreach, segment audiences, and identify contacts worth investing in.
8–10
Highly engaged
4–7
Moderate activity
0–3
Low / inactive
Data Enrichment
Turn an email address into a complete contact record. Postmaster+ appends real-world data — postal addresses, full names, company information, and demographic details — directly from email addresses. No third-party data append services needed.
Example enrichment result
Name: John Smith
Company: Acme Corporation
Address: 123 Main St, Austin, TX 78701
Demographics: Professional, 30-45, Tech Industry
Who Uses Email Intelligence?
Marketers
Clean lists before campaigns, segment by engagement score, and enrich CRM records to personalize outreach. Reduce bounces and improve inbox placement.
Sales Teams
Verify prospect emails in real time, prioritize leads with high engagement scores, and enrich contact records without manual research.
Fraud Prevention
Block disposable and high-risk email addresses at signup. Combine verification status with engagement scoring to detect suspicious accounts.
Platform Builders
Integrate email intelligence via API to validate user emails at registration, reduce fake accounts, and maintain data quality at scale.
How It Works
Submit an email address
Send a single email or batch list to the API. Choose which intelligence layers you need — verification, activity scoring, enrichment, or all three.
We analyze in real time
Postmaster+ validates the mailbox, checks engagement signals, and queries enrichment databases. Results are returned in a single JSON response.
Act on the results
Use deliverability status to accept/reject emails, engagement scores to prioritize outreach, and enriched data to personalize communications.
Why Postmaster+ Intelligence?
All-in-one API call
Verification, engagement scoring, and enrichment in a single request — not three separate vendors.
Engagement data others lack
Most verification tools only check if a mailbox exists. We predict whether anyone actually reads it.
Real enrichment data
Postal addresses, demographics, and company data appended directly — no CSV uploads to third-party services.
Credit-based pricing
Pay for what you use. All intelligence features draw from the same credit pool with no hidden per-feature charges.