Email Verifier - Bulk SMTP Email Validation

Verify email lists in bulk before you send. For every address, this Actor checks the syntax, the domain's mail servers (MX) and asks the mail server itself, over SMTP, whether the mailbox exists. It also detects catch-all domains, disposable (throwaway) providers and role accounts (info@, sales@...), and suggests a fix for obvious typos (gmial.com becomes gmail.com).

You pay only for conclusive results. An email is billed only when it comes back valid or invalid. Catch-all, risky and unknown results are free.

What you get

• Live SMTP mailbox check. The Actor connects to the recipient's mail server and asks whether the mailbox exists (RCPT TO). No email is sent.
• Catch-all detection. Some servers accept any address, so the mailbox can't be confirmed. These addresses are flagged catch-all and are never billed.
• Disposable and role-account detection. Mailinator, Yopmail, 10minutemail and similar providers are flagged. So are generic mailboxes such as info@, support@ and sales@.
• Typo suggestions. Catches mistakes like gmial.com, hotmial.com, yahooo.com and gmail.con.
• Bulk and deduplicated. Paste thousands of emails. Duplicates are removed (case-insensitive), so each address is verified and billed once.
• Budget-safe. The Actor never verifies more billable emails than your Maximum cost per run allows.
• No API key and no setup. Results can be downloaded as JSON, CSV or Excel, or read through the Apify API.

Input

Field	Description	Default
emails	The addresses to verify, one per line. Through the API, send an array.	required
checkCatchAll	On: catch-all domains get the status catch-all. Off: they are reported as risky. Neither is billed.	true
timeoutSecs	Maximum wait for one mail server (5 to 120 s). Servers that don't answer in time return unknown, which is free.	30
concurrency	Number of emails checked in parallel (1 to 10).	5

{
  "emails": ["rand@sparktoro.com", "john@gmial.com", "info@acme.com"],
  "checkCatchAll": true,
  "timeoutSecs": 30
}

Output

Each unique email produces one row:

{
  "email": "rand@sparktoro.com",
  "status": "valid",
  "reason": "Mailbox exists",
  "suggestion": null,
  "syntaxValid": true,
  "domain": "sparktoro.com",
  "mxFound": true,
  "mxHost": "aspmx.l.google.com",
  "disposable": false,
  "roleAccount": false,
  "freeProvider": false,
  "catchAll": false,
  "smtpConnected": true,
  "deliverable": true,
  "fullInbox": false,
  "disabled": false,
  "smtpCode": null,
  "smtpMessage": null,
  "charged": true
}

Statuses

Status	Meaning	Billed
valid	The mail server confirmed that the mailbox exists. Role accounts are flagged with roleAccount: true.	yes
invalid	Bad syntax, a domain with no mail server, a mailbox rejected by the server, or a disabled mailbox.	yes
catch-all	The server accepts every address, so the mailbox can't be confirmed.	no
risky	Disposable provider, full inbox, or catch-all when checkCatchAll is off.	no
unknown	The server didn't give a clear answer (timeout, greylisting, temporary error).	no

The reason, mxHost, smtpCode and smtpMessage fields explain every verdict. suggestion holds a corrected address when the domain looks like a typo of a common provider.

A SUMMARY record in the key-value store counts the results per status.

Pricing

Pay per event: $0.95 per 1,000 verified emails. You are billed only for valid and invalid results. Duplicates, catch-all, risky and unknown results cost nothing.

This Actor is available on paid Apify plans. On a free plan, the run returns a single item that explains this, and nothing is billed.

Use it through the API

curl -X POST "https://api.apify.com/v2/acts/pnda~email-verifier/run-sync-get-dataset-items?token=YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"emails": ["rand@sparktoro.com", "nobody@example.com"]}'

It also works from Make, Zapier, n8n and the Apify Python and JavaScript clients.

FAQ

Does it send emails? No. The SMTP conversation stops before any message is sent.

Why are some addresses catch-all? Many company domains, often on Google Workspace or Microsoft 365, accept mail for any address. No SMTP tool can confirm a single mailbox on these domains, which is why these results are free.

Why unknown? Some servers delay first-time senders (greylisting) or don't answer in time. The Actor retries once. If the answer is still unclear, the result is unknown and free. You can run these addresses again later.

How fast is it? Around 60 emails in about 12 seconds with concurrency: 10. Slow mail servers take longer.

How do I stay under a budget? Set Maximum cost per run in the run options. The Actor stops before it goes over.