The verification database built from 20 years of real sending.
Most verification tools check DNS records. Sendability Verify adds 20 billion emails of historical sending intelligence. The difference is what you can't fake: time, volume, and real delivery patterns.
Used in production by enterprise senders across 10 countries. 1B+ emails/month validated.
What every other verification tool misses
DNS-only verification catches obvious problems. It misses everything else.
Catch-all domains
Standard tools return "valid" for catch-all domains. Sendability Verify adds historical delivery pattern data to classify catch-all domains as deliverable or not, based on actual send results across 20 years.
Spam trap intelligence
Spam traps look like normal addresses to DNS lookups. Sendability Verify's historical sending database surfaces addresses with known trap behavior before they damage your sender reputation.
Disposable provider database
New disposable email providers emerge daily. Static databases are always behind. Sendability Verify updates its disposable provider list continuously from live sending volume patterns.
Four-layer validation cascade
Every email and domain passes through multiple validation layers in under 100ms.
Layer 1: Passive DNS signals
Null MX (RFC 7505), SPF -all, DMARC p=reject, domain age, registrar signals. Catches obvious invalids in under 10ms without active probing.
Layer 2: Disposable database
40,000+ disposable and temporary email providers. Updated from live sending patterns, not static lists updated quarterly.
Layer 3: Historical intelligence
20B+ email history classified by delivery outcome. Surfaces domains and addresses with known problematic behavior that DNS checks cannot detect.
Layer 4: Active probe
SMTP catch-all detection for remaining unknowns. SEG-aware: bypasses Proofpoint and Mimecast gateways that return false positives on standard probes.
Conservative by design
When in doubt, Sendability Verify protects your sender reputation. Uncertainty returns Greylist, not Valid.
DNS passes all checks, no historical flags, no disposable signal. Safe to add to your database and send to.
Insufficient confidence to confirm valid. Catch-all domains, unknown providers, or insufficient sending history to classify.
Hard bounce risk, spam trap signal, disposable provider, or domain configured to reject all mail. Do not add to your database.
Integrate in minutes
REST API. Sub-100ms response. Works with any ESP, CRM, or form builder.
REST API
Single endpoint. JSON response. Authentication via API key. Available standalone or included in all Sendability platform plans.
- Real-time form validation at point of capture
- Batch list cleaning before campaigns
- Webhook support for async processing
- EU-hosted. GDPR-native. Data never leaves your control.
Pre-built connectors
Native integrations for the tools your team already uses.
- Mautic (native, no plugin required)
- Mailchimp
- HubSpot
- Klaviyo
- Salesforce Marketing Cloud
- Brevo / ActiveCampaign
- Custom webhook for any platform
Start validating with 20 years of intelligence behind you.
Get API access or add Verify to your Sendability stack.
Get API AccessAlready a client? Access your Verify dashboard →