Smart Email Finder & Verifier

Find professional email addresses using intelligent pattern discovery. Input name + domain, get email addresses with confidence scoring.

Features

• Intelligent Pattern Generation: Tests up to 14 common corporate email formats (first.last@, flast@, first@, etc.)
• SMTP Verification: Verifies if the email mailbox exists (when supported by mail server)
• MX Record Validation: Confirms the domain has valid mail servers
• Catch-All Detection: Identifies domains that accept all emails to avoid false positives
• Pattern Fallback: Returns best-guess email with lower confidence when SMTP blocked
• Confidence Scoring: 0-100 score based on verification depth
• Bulk CSV Support: Process hundreds of contacts at once
• Disposable Email Detection: Flags temporary/throwaway email domains
• Cloud-Optimized: 30-second timeout per contact, handles blocked SMTP gracefully

How It Works

1. Generate Patterns: Creates 14 common email formats from the provided name
2. Check Domain: Verifies the domain has MX (mail exchange) records
3. Detect Catch-All: Tests if domain accepts all addresses (reduces false positives)
4. Verify Emails: Tests each pattern via SMTP RCPT TO command
5. Stop on Success: Returns first verified email to save credits

Input

{
  "contacts": [
    {
      "first_name": "Tim",
      "last_name": "Cook",
      "domain": "apple.com"
    },
    {
      "first_name": "Satya", 
      "last_name": "Nadella",
      "domain": "microsoft.com"
    }
  ],
  "maxPatternsToTest": 8,
  "verificationLevel": "smtp",
  "detectCatchAll": true,
  "timeout": 5
}

Input Fields

Field	Type	Description
contacts	array	List of contacts with first_name, last_name, domain
csvInput	string	Alternative: paste CSV data
maxPatternsToTest	integer	Max patterns to test per contact (1-14, default: 8)
verificationLevel	string	"format", "mx", or "smtp" (default: smtp)
detectCatchAll	boolean	Test for catch-all domains (default: true)
timeout	integer	SMTP connection timeout in seconds (default: 5)

CSV Format

first_name,last_name,domain
Tim,Cook,apple.com
Satya,Nadella,microsoft.com

Output

{
  "email": "tcook@apple.com",
  "first_name": "Tim",
  "last_name": "Cook",
  "domain": "apple.com",
  "is_valid_format": true,
  "has_mx_records": true,
  "is_verified": true,
  "is_catch_all": false,
  "confidence_score": 90,
  "verification_method": "smtp",
  "smtp_code": 250,
  "smtp_message": "2.1.5 tcook@apple.com Ok",
  "mx_host": "mx-in.g.apple.com",
  "patterns_tried": 3,
  "verification_time_ms": 2635,
  "error": null
}

Output Fields

Field	Description
email	Found email address (or best guess)
is_verified	True if SMTP verification confirmed mailbox exists
is_catch_all	True if domain accepts all addresses
confidence_score	0-100 confidence rating
patterns_tried	Number of patterns tested before success
smtp_code	SMTP response code (250 = success)

Confidence Score Guide

Score	Meaning	Verification Method
90	SMTP verified, mailbox exists	smtp
60	SMTP verified, but catch-all domain	smtp
55	Pattern not rejected by SMTP	smtp_partial
45	Pattern-based guess (SMTP blocked)	pattern_fallback
50	MX records confirmed	mx
35	Format only, no verification	format
0	Invalid domain or no MX records	-

Note: Most large companies (Apple, Microsoft, Google, etc.) block SMTP verification from datacenter IPs. For these domains, you'll get pattern-based results with 45% confidence. The pattern first.last@domain.com is correct for 70%+ of corporate emails.

Verification Levels

• format: Fastest. Only validates email format. Low accuracy.
• mx: Medium. Checks if domain has mail servers. Better accuracy.
• smtp: Most thorough. Verifies mailbox exists. Best accuracy.

Limitations

• SMTP Blocking: Many large companies (Apple, Google, Microsoft, etc.) block SMTP verification from datacenter IPs. Pattern-based fallback is used in these cases.
• Catch-All Domains: Some domains accept all addresses, making verification unreliable
• Rate Limiting: High volume may trigger mail server rate limits
• 30-Second Limit: Each contact has a 30-second max processing time

Expected Results by Domain Type

Domain Type	Example	Expected Result
Small/Medium Business	startupxyz.com	Often SMTP verified (90% confidence)
Enterprise (relaxed security)	ibm.com	Sometimes SMTP verified
Big Tech	google.com, apple.com	Pattern fallback (45% confidence)
Catch-All Domains	Various	Verified but lower confidence (60%)

Use Cases

• Sales Outreach: Find decision-maker emails for cold outreach
• Recruiting: Locate candidate contact information
• Lead Generation: Enrich lead lists with verified emails
• Data Enrichment: Add email addresses to CRM records
• Research: Find contact info for journalists, experts, etc.

Pricing

$8 per 1,000 verified emails found.

You only pay for emails that are successfully verified. Unverified results are free.

Related actors

• google-maps-business-scraper — Google Maps businesses
• yelp-intelligence-scraper — Yelp business data
• open-brewery-db-business-intelligence — brewery business data

Support

For questions or issues, contact the developer or open an issue in the repository.