The challenge
Invalid and low-quality addresses created avoidable delivery failures and unreliable contact records.
MailProof.
Email quality checks before data enters critical workflows.
<1sValidation latency
The result
Cleaner inputs before delivery.
Created to reduce unreliable contact data and give downstream systems a clear validation result they can act on.
What we built
A staged validation pipeline that checks address structure, domain signals, and delivery readiness through one consistent interface.
The outcome
Forms, imports, and automation flows could validate addresses before committing them to the next step.
- Primary fit
- Contact quality
- Core route
- Pre-flight checks
- Main gain
- Cleaner inputs
Scope
- Syntax checks
- Domain validation
- Quality signals
- Validation API
Stack
- Rust validation engine
- NestJS API
- Next.js dashboard
- DNS + mailbox checks