Email Intelligence &
Deliverability Platform
Verify emails, enrich contact data, monitor sender compliance, and detect blocklists with the industry's deepest link scanning — all in one platform.
No credit card required · Free tier available · Cancel anytime
TRUSTED BY ENTERPRISE SENDERS WORLDWIDE
Beyond Verification. True Intelligence.
Go beyond basic verification with comprehensive email intelligence — validate deliverability, enrich with engagement data, and append real-world contact information.
Email Verification
Real-time validation to catch invalid, fake, and mistyped emails before they bounce.
Engagement Scoring
Predict email engagement with historical activity and behavioral signals.
Data Enrichment
Append postal addresses, demographics, and contact data from email addresses.
Enriched Data
Name: John Smith
Company: Acme Corp
Address: 123 Main St, Austin, TX
Complete Sender Compliance & Reputation
Monitor everything that affects your inbox placement — from mailbox provider reputation data to DNS configuration, complaint rates, authentication, and blocklist status.
MBP Reputation Data
Gmail Postmaster Tools, Outlook SNDS, Yahoo, and Comcast data in one dashboard.
DNS & Authentication
SPF, DKIM, DMARC, TLS, IP rDNS — continuous monitoring with instant alerts.
Complaint Rate Monitoring
Track spam complaints across providers with customizable thresholds.
Domain & IP Blocklists
Only blocklists that actually impact delivery — no noise from irrelevant lists.
Reputation
HIGH
Complaint Rate
0.02%
Industry's Deepest Blocklist Detection
Our Blocklist API doesn't just check — it detonates links, follows every redirect, and scans each hop to uncover hidden blocklists that surface-level checks miss entirely.
Link Detonation
Every link is opened and analyzed for malicious redirects and hidden blocklists.
Redirect Following
Scan every hop in redirect chains to find blocklists others miss.
Impactful Blocklists Only
We only check blocklists known to affect delivery — no pointless alerts.
Simple, Transparent Pricing
Pay only for what you use. Credits never expire for 12 months.
Deliverability Monitoring
DNS, Authentication & Compliance
- SPF, DKIM, DMARC monitoring
- IP rDNS & TLS checks
- Complaint rate monitoring
- MBP reputation data (Gmail, Outlook, Yahoo)
- Domain & IP blocklist monitoring
API Credits
Email Intelligence & Blocklist API
Shared credit system for all API calls. Credits are valid for 12 months from purchase.
Results for yourdomain.com
Free Email Compliance Scan
Check your sending domain against the latest sender guidelines by Google and Yahoo. Validate your SPF, DKIM, DMARC, TLS, and more.
Run Free ScanReady to Maximize Your
Email Deliverability?
Join thousands of senders who trust Postmaster+ to protect their reputation and reach the inbox. Start free today.
No credit card required · Free tier available · Cancel anytime