NeverBounce Bulk Email Verifier Actor

A lightning-fast, ultra-low bandwidth email deliverability verification Actor powered by NeverBounce and Scrapling StealthyFetcher, with automated Apify Proxy session rotation, multi-input batch parsing, and in-page PerimeterX IP consistency.

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⚡ Key Features

• Flexible Multi-Input Support:
  • emails: List of email strings (["a@b.com", "c@d.com"]).
  • emails_text: Paste raw bulk text with emails separated by commas, newlines, or spaces.
  • email: Single email address for quick testing.
  • items: Pass raw objects from previous scraping runs ([{"email": "..."}, ...]).
• Internal Proxy Rotation & Session Isolation:
  • Automatically allocates a unique sticky session ID (session_id = nb_<hex>_<attempt>) for each email and retry attempt.
  • Seamlessly integrates with Apify Proxy (Residential, Datacenter, or Auto).
  • Also supports a list of custom proxy URLs (custom_proxies) with round-robin rotation.
• 100% PerimeterX IP Consistency:
  • Solves the PerimeterX IP mismatch by executing verification inside the browser page context over the identical TLS socket.
  • Eliminates 403 BOT_CHALLENGE access denials.
• Minimal Proxy Bandwidth:
  • Pre-cached PerimeterX captcha.js is fulfilled directly from RAM (0 external proxy bytes).
  • Aborts images, media, fonts, stylesheets, and ad trackers.
  • Average bandwidth: only ~10.8 KB per verification!
• Concurrent Execution & Live Streaming:
  • Configurable parallel workers (max_concurrency: 1–10).
  • Streams each verified email directly into the Apify dataset in real time.
  • Stores a comprehensive run summary in the default Key-Value store (OUTPUT).

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📥 Input Parameters

Field	Type	Default	Description
emails	Array of Strings	[]	List of email addresses to verify.
emails_text	String (Textarea)	""	Bulk paste text with emails (separated by commas, newlines, spaces).
email	String	""	Single email address for quick test.
proxyConfiguration	Object	{ "useApifyProxy": true }	Apify Proxy configuration (Automatic, Datacenter, or Residential).
custom_proxies	Array of Strings	[]	(Optional) List of custom proxy URLs (http://user:pass@host:port) to rotate round-robin.
max_concurrency	Integer	3	Number of concurrent verification workers (1–10).
max_retries	Integer	2	Max retry attempts with fresh rotated proxy session on errors.

Example 1: Bulk Paste Text Input

{
  "emails_text": "contact@stripe.com, satya@microsoft.com\nbill.gates@gatesfoundation.org, invalid.fake.123@google.com",
  "max_concurrency": 4
}

Example 2: Structured Array Input

{
  "emails": [
    "satya@microsoft.com",
    "bill.gates@gatesfoundation.org",
    "support@neverbounce.com"
  ],
  "proxyConfiguration": {
    "useApifyProxy": true
  },
  "max_concurrency": 3
}

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📤 Output Dataset Format

Each verified email generates a structured record in the default Apify dataset:

{
  "email": "satya@microsoft.com",
  "status": "valid",
  "is_valid": true,
  "historical_response": true,
  "free_email": false,
  "role_account": false,
  "smtp_connectable": true,
  "has_dns": true,
  "has_dns_mx": true,
  "flags": [
    "has_dns",
    "has_dns_mx",
    "smtp_connectable",
    "historical_response"
  ],
  "verification_method": "stealth_in_page",
  "transfer_bytes": 10800,
  "proxy_session": "nb_a1b2_1",
  "attempts": 1,
  "latency_seconds": 8.42,
  "error": null
}

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📊 Summary Output (Key-Value Store: OUTPUT)

{
  "total_emails": 100,
  "valid_count": 72,
  "invalid_count": 14,
  "catchall_count": 4,
  "unknown_count": 10,
  "failed_count": 0,
  "success_rate_percent": 90.0,
  "total_bandwidth_mb": 1.08,
  "avg_bandwidth_per_email_kb": 10.8,
  "duration_seconds": 245.3,
  "avg_latency_seconds": 2.45
}