optinize Book a call
Home / Free Tools / List health / email verification
List health / email verification

Find the addresses that create more risk than value.

Verification can identify invalid and risky addresses. Optinize combines that with engagement and commercial context before recommending suppression.

FreeNo cardBuilt for diagnosis
No customer addresses are uploaded from this static page.

Do not publish DNS records or suppress customer data solely from an automated result. Validate changes against your actual sending stack.

What this tool can and cannot tell you

Useful for

  • Fast initial diagnosis
  • Finding obvious configuration or content risk
  • Preparing a more focused technical review

Not proof of inbox placement

  • Mailbox providers use private reputation signals
  • Results vary by message, audience and infrastructure
  • A real placement test requires a controlled send

Need the answer mailbox providers do not publish?

Run the full inbox placement test across Gmail, Outlook and Yahoo, then receive fixes ranked by impact.

Open the placement testTalk to an expert