Email Verifier

Check whether an email address is likely to be real and deliverable — syntax, mail servers, disposable domains, typos, and role accounts.

How it works

Every address runs through seven checks, live:

  1. Syntax — is it a well-formed address per RFC 5322?
  2. Typo detection — edit distance against popular providers catches slips like gmial.com and suggests the fix.
  3. Mail servers — a live DNS lookup confirms the domain publishes MX records (or an A-record fallback) that can actually receive mail.
  4. Sender authentication— TXT lookups check whether the domain publishes SPF and DMARC policies, a strong signal it's an actively managed, legitimate mail domain.
  5. Disposable domains — checked against an open dataset of thousands of throwaway email providers.
  6. Role accounts — shared inboxes like info@ or noreply@get flagged; they're risky targets for personal correspondence or marketing lists.
  7. Provider type — free consumer provider vs. custom/business domain, for context.

Why not verify the exact mailbox? Commercial verifiers open an SMTP connection and ask the mail server whether the mailbox exists (RCPT TO). That requires outbound port 25, which serverless platforms like Vercel block to prevent spam — and doing it reliably takes dedicated servers with warmed-up sending reputation. So a “Deliverable” verdict here means the domain accepts mail, not that the specific mailbox exists. This tool prefers being honest about that boundary over pretending otherwise.

Addresses are checked in-memory and never stored or logged.