# Email Finding

> Find verified work email addresses for B2B contacts using multi-provider waterfall discovery. Use when the user wants to find emails, look up contact information, discover email patterns, enrich a list with email addresses, find decision-maker emails, or get verified contact data for outreach. Triggers on: \"find email\", \"get their email\", \"email discovery\", \"look up email\", \"find contact info\", \"email enrichment\", \"what's their email\", or any request to locate professional email addresses for prospects.

- Skill: `leadmagic/email-finding` (Agent Skill, multi-file: 4 files)
- Install (CLI): `npx skillmds@latest add leadmagic/email-finding`
- Raw SKILL.md: https://api.skillmd.com/api/skills/leadmagic/email-finding/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Product & Planning
- License: MIT
- Author: LeadMagic (https://skillmd.com/u/leadmagic)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/leadmagic/email-finding

---


# Email Finding

## Overview

Finding verified work emails is the highest-stakes step in B2B prospecting.
Unverified emails damage sender reputation within a week. A single batch of
bounces can require months of domain warmup to recover from.

This skill walks through email discovery using a multi-provider waterfall —
starting with the highest-accuracy source first, falling back only when that
source returns empty. Every email found must be verified before entering any
outbound sequence.

## When to Use

- \"Find the email for John Smith at Acme Corp\"
- \"Get me verified emails for this list of contacts\"
- \"What's the email pattern for company.com?\"
- \"Look up Jane's work email\"
- \"Enrich this CSV with email addresses\"

Do NOT use for:
- Phone number finding — that's a separate waterfall
- Full company research — use lead-enrichment first
- Already have emails — skip to contact-verification

## Authoritative Foundations

Email finding follows waterfall enrichment principles from DAMA-DMBOK data-quality dimensions (waterfall
waterfall: Apollo → ZoomInfo → PDL → Claygent → Claude normalization) and
Ziellab's 3-waterfall architecture (separate company, email, and phone
waterfalls run independently).

The core insight: no single provider covers more than 60-75% of B2B contacts.
Chaining 3-5 providers in sequence routinely pushes coverage to 85-92%.

## Prerequisites

- First name + last name + company domain (minimum)
- LinkedIn URL significantly improves match rates (15-25 percentage points)
- If using a provider like Apollo, ZoomInfo, or Clay: valid API key or active subscription

## Step-by-Step Process

### Phase 1: Intake

Ask the user for:
1. How many contacts need emails? (single lookup vs batch)
2. What data do you have for each? (name, company, LinkedIn URL)
3. What providers do you have access to? (Apollo, ZoomInfo, Clay, etc.)
4. What's the budget per contact? (emerging vs enterprise providers)

### Phase 2: Provider Selection

Treat these vendors as evaluation candidates, not a verified ranking. Measure cost per valid result on an authorized sample of the user's segment:

| Provider | Best For | Match Rate Est. | Cost Profile |
|---|---|---|---|
| LeadMagic Email Finder | Evaluate for the target segment | Measure on an authorized sample | Check current pricing |
| Apollo | Evaluate for the target segment | Measure on an authorized sample | Check current pricing |
| ZoomInfo | Evaluate for the target segment | Measure on an authorized sample | Check current pricing |
| People Data Labs | Evaluate for the target segment | Measure on an authorized sample | Check current pricing |
| Hunter.io | Evaluate for the target segment | Measure on an authorized sample | Check current pricing |
| Regional email provider | Evaluate for the target segment | Measure on an authorized sample | Check current pricing |
| Claygent (Clay) | Evaluate for the target segment | Measure on an authorized sample | Check current pricing |

Build the waterfall from cheapest + highest-coverage first, falling back to more
expensive providers only when earlier steps miss.

### Phase 3: Run the Waterfall

For each contact:

1. **Primary provider** — Run the highest-accuracy, lowest-cost provider first.
   For most US B2B: LeadMagic Email Finder (returns verified results) or Apollo.

2. **Fallback 1** — If primary returns empty, run secondary provider.
   ZoomInfo for enterprise, Hunter for domain-based lookup.

3. **Fallback 2** — If still empty, run tertiary.
   People Data Labs or regional compliance provider depending on region.

4. **AI-assisted (Claygent)** — For remaining 10-15%, use Claygent with an
   explicit prompt: \"Find the work email for [name] at [company]. Return the
   email address AND the source URL. Do NOT guess or construct emails from
   patterns. If no verified source found, return empty.\"

5. **Normalization** — Consolidate results. Use COALESCE logic: prefer results
   from earlier waterfall steps. Prefer verified over pattern-matched.

### Phase 4: Verification

Every found email must be verified before use. Run verification as a separate
step — never skip it. See contact-verification skill.

Acceptable verification results: valid only. Handle risky/catch-all results
separately (lower volume, extra monitoring). Discard invalid results.

## Output Format

For a single lookup:
```
Contact: John Smith, Acme Corp
Email: person@example.com
Source: LeadMagic Email Finder
Status: Verified — valid
Confidence: High
```

For batch enrichment, produce a CSV with columns:
`email`, `email_source`, `email_confidence`, `verification_status`

## Quality Check

- [ ] Every email found has a source attribution
- [ ] Every email has been run through verification
- [ ] Bounce rate target: under 2% across the batch
- [ ] No pattern-guessed emails without source confirmation
- [ ] Catch-all domains flagged separately

## Common Pitfalls

1. **Skipping verification.** Unverified emails cause bounces. Bounces damage
   sender reputation. Recovery takes weeks. Always verify after finding.

2. **Single-provider dependency.** One provider covers 60-75% max. Running
   only Apollo leaves 25-40% of contacts unreachable. Always waterfall.

3. **Using pattern-guessed emails.** Constructing person@example.com
   without confirmation creates 40-60% bounce rates. Never guess. Verify.

4. **Running waterfall in wrong order.** An expensive provider first burns
   budget on contacts a cheaper provider would have found. Sort by cost-per-hit.

5. **Not normalizing company names.** \"Acme Inc\" vs \"Acme, Inc.\" vs \"Acme
   Corporation\" create duplicate lookups. Match on domain, not name.

6. **No LinkedIn URLs in input.** Adding LinkedIn URLs improves match rates
   by 15-25 percentage points across all providers. Run a LinkedIn URL finder
   column before email finding when URLs are missing.

## Execution Artifacts

- `references/framework-notes.md` — Named frameworks and reference tables
- `templates/output-template.md` — Deliverable shell for agent output
- `scripts/check-output.py` — Lightweight deliverable validator

## Related Skills

- **lead-finding**: Finds the contacts this skill enriches with email addresses
- **lead-enrichment**: Full enrichment beyond email (firmographics, technographics)
- **contact-verification**: Run after this skill — validates found emails before sending
- **waterfall-enrichment**: Complete multi-field waterfall architecture