{
  "id": 15574385,
  "title": "Validate a list of 10,000 emails without SMTP for about $10",
  "url": "https://urgent.news/2026/10/19/validate-a-list-of-10-000-emails-without-smtp-for-about-10",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-10-19T07:03:48.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/jeezleweez_71e2a581f71298/validate-a-list-of-10000-emails-without-smtp-for-about-10-1ke5"
  },
  "original_language": "en",
  "account": "Email verification is crucial before importing a lead list or sending a campaign. A common method involves checking SMTP connections to each mail server, which can be time-consuming and may lead to IP blockages. A more cost-effective approach is to use a DNS-based verification, which can be done using an Apify actor called Email Verifier & Validator (No SMTP). This actor checks various aspects of an email address without SMTP probing.\n\nThe actor performs several checks on each address, including syntax validation, DNS checks (MX records, A/AAAA fallback, and null-MX detection), and identification of disposable domains, role accounts, and free providers. It also suggests typo corrections for common providers. However, the actor cannot confirm if a specific mailbox exists, as that would require SMTP-based verification, which is more expensive and often yields uncertain results.\n\nThe cost of using this actor is $0.001 per email checked. For a list of 10,000 emails, the cost would be approximately $10. The actor also removes duplicate entries from the list before billing. If a DNS lookup for an address fails, the address is not charged, and invalid-syntax rows are charged like any other row. The compute time is included in the per-event price.\n\nTo use the actor, you need to provide the email addresses in a CSV file or directly in the actor's input. The input format for a CSV file requires a public URL to the file, the column header containing the email addresses, and an optional maximum number of emails (default is 10,000). The output includes details about each email, such as its validity, status (deliverable_domain, disposable, invalid_domain, etc.), associated domain, MX records, and any suggested corrections.",
  "summary": "Before you import a lead list or send a campaign, you want to drop the junk: typos, fake domains, throwaway inboxes. Many verifiers do this by opening SMTP connections to each mail server, which is slow and often gets IPs blocked. A cheaper first pass skips SMTP and checks everything you can know from the address and DNS alone. This post shows how to run that pass on a CSV or a list of up to…",
  "key_points": [
    "Email verification without SMTP costs $0.001 per email",
    "Apify actor Email Verifier & Validator performs DNS checks",
    "$10 covers verification of 10,000 emails"
  ],
  "editors_take": "Shifting from SMTP probing to DNS-based validation offers a cheaper way to clean lead lists while protecting sender reputations from the IP blockages often caused by traditional verification methods.",
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}