Email verification

Single verifications cannot be cancelled mid-flight because they complete in seconds. Bulk verifications can be cancelled from the dashboard, and any unprocessed credits are refunded automatically.

When a verification returns Unknown, the credit auto-refunds. Re-running the same address uses one credit — but if it also returns Unknown, that credit refunds too. So Unknown re-runs are effectively free.

Yes. Every verification result is tagged with the provider that produced it (currently Reoon or EmailListVerify). The tag appears in the verification-results table and in the bulk task CSV export.

Yes. Each request runs through the Valid Email Checker engine fresh and charges one credit. There is no caching on the dashboard widget side — you always get a live result.

Why catch-all domains exist, what they cost you in bounce rate and reputation, and the three ways to handle them. The full B2B-vs-B2C breakdown, with an action plan.

Export your verification results to CSV, XLSX, JSON, or TXT. Filter by status before download, recover unprocessed emails, and watch the 15-day retention deadline.

A complete reference for every verification status — Safe, Role, Catch-All, Disposable, Inbox Full, Disabled, Invalid, Spam Trap, Unknown — with scores and what to do with each.

99%+ verification accuracy backed by the 11-step engine and a dual-provider fallback stack. When the engine can't reach a definitive answer, the credit is automatically refunded — you only pay for results you can act on.

During verification, the engine sends a deliberately fake address to the same domain. If the server accepts that too, the domain is catch-all and the original result is flagged accordingly.

Greylisting causes mail servers to temporarily reject unfamiliar senders. The Valid Email Checker engine retries with backoff and falls back to a secondary provider when the first attempt stays unresolved.

Yahoo and older Hotmail return generic responses to RCPT TO probes regardless of whether the mailbox exists. VEC uses additional signals — pattern matching, response timing, deeper SMTP conversation — to extract real verdicts.

A typical single verification completes in 2 to 6 seconds through the Valid Email Checker engine. Most of that is the SMTP handshake with the recipient mail server; the rest is internal routing.

Use the verification bar at the top of your dashboard to check one email in seconds. Get status, deliverability, risk score, and detailed flags. 1 credit per check.

Every address runs through 11 checks: syntax, domain DNS, MX records, SMTP, mailbox existence, catch-all detection, disposable, role, spam trap, inbox-full, and disabled-account. No emails are ever sent to your contacts.

What Valid Email Checker actually commits to: 99%+ verification accuracy backed by the 11-step engine, automatic credit refunds when we can't reach a definitive answer, 15-day retention, no test emails to your contacts, and no data resale.

Results don't match what you expected? Wrong status, missing emails, duplicate rows, results not visible, or you suspect the engine got it wrong? Diagnose by symptom, with the code paths behind each behavior.

Read your results spreadsheet like a pro. What each of the 14 verification columns means, how to filter, and what to do with every email status — Safe, Role, Catch-All, and the rest.

Disposable flags throwaway services like Mailinator and 10MinuteMail. The list is maintained by our verification providers and refreshed continuously from public lists plus our own abuse signals.

Unknown means the mail server didn't give a definitive answer to our SMTP check. We auto-refund the credit, so you only pay for results we can stand behind.

Every verification runs through eleven checks in sequence: syntax, domain DNS, MX, SMTP handshake, mailbox existence, catch-all, disposable, role, spam trap, inbox full, and disabled. Each step looks at a different failure mode.

Disabled means the mailbox once existed but has been turned off by the provider — usually because the recipient closed the account, left the company, or was deactivated by an admin.

Inbox Full means the mailbox exists, is active, and rejected our verification probe because the recipient is over their storage quota. It is a soft bounce condition that can resolve on its own.

Invalid means the mailbox does not exist or the address is unreachable for a structural reason — bad syntax, no domain, no MX, or a confirmed mailbox rejection from the server.

Risky means the address technically exists but carries enough warning signals that sending to it could hurt your sender reputation. It is a hedge, not a clean pass.

Role marks an address as a function-based mailbox (info@, sales@, support@) that is shared by multiple people. The mailbox is real but the engagement risk is higher than a personal address.

The confidence score on each verification result is a 0 to 100 number summarising how strongly the engine believes the status. Safe results land around 98, Catch-All around 71, Disposable around 30, Spam Trap around 3.

The badge on the Single Email Verifier widget shows the canonical status (Safe, Risky, Invalid, etc.) returned by the engine. Colour-coded for quick scanning; the modal expands the full result.

Valid Email Checker routes through a primary verification provider, then falls back to a secondary when the primary returns Unknown or fails. The customer sees a definitive result whenever possible.

The Valid Email Checker engine does not cache results across requests. Each call hits the engine fresh, charges one credit, and returns a current status — even if you just verified the same address minutes ago.

A catch-all domain accepts mail for any address at that domain — even ones that do not exist. We flag catch-all separately so you can decide how to handle them.

A disposable email is a temporary inbox from services like Mailinator or Guerrilla Mail. They exist to receive one signup and then get abandoned. Sending to them is wasted budget.

A spam trap is an email address used by anti-spam organizations to identify senders with poor list hygiene. Hitting one signals you are sending to addresses you should not have, which damages your sender reputation.

Email verification checks whether an email address is real and safe to send to. It catches typos, dead inboxes, disposable accounts, and spam traps before they damage your sender reputation.

A provider timeout means the recipient mail server did not respond in time. The engine retries through a secondary provider; if that also times out, the result is Unknown and the credit refunds automatically.

Email verification is point-in-time. Mailbox state can change between checks — inbox full clears, mailboxes get disabled, greylisting kicks in. The engine reports what the server says now.

Gmail and Outlook run high-performance mail servers that respond to SMTP probes quickly. The Valid Email Checker engine sees results in under 2 seconds versus 5 to 6 for smaller providers.