// verified b2b email list
MailOptin Email List
Reach companies using MailOptin with verified, deliverable B2B contact emails, ideal for technographic targeting, competitive displacement, and integration outreach.
- verified contacts
- 84,454
- companies
- 5,027
MailOptin Email List (sample 20)
Download the full list| Name and title | Company | Status | |
|---|---|---|---|
D David Kuan vp corporate finance business planning kingston | kingston | dav***@kingston.com | Verified |
C Claudia Adduce associate professor Sapienza Università di Roma | Sapienza Università di Roma | ad***@uniroma3.it | Verified |
G Gregor Yule customer support and administrator Energy Saving Trust | Energy Saving Trust | gre***@energysavingtrust.org.uk | Verified |
M Michael Berkens editor publisher The Domains | The Domains | a***@thedomains.com | Verified |
S Serge Morozov ceo HelpCrunch | HelpCrunch | ser***@helpcrunch.com | Verified |
D Derek Jensen VP Richardson Sports | Richardson Sports | de***@richardsonsports.com | Verified |
P Paris Glover Marketing Director Eventnoire | Eventnoire | p***@eventnoire.com | Verified |
P Patrick Hollstein ceo APOTHEKE ADHOC | APOTHEKE ADHOC | vi***@apotheke-adhoc.de | Verified |
B Britta Wiebe period expert and co-founder Vulvani | Vulvani | br***@vulvani.com | Verified |
A Amber Nieto Business Development Manager Mexico News Daily | Mexico News Daily | amb***@mexiconewsdaily.com | Verified |
E Edy Budiman ceo Dewaweb | Dewaweb | e***@dewaweb.com | Verified |
D Dan Meyer senior editor RCR Wireless News | RCR Wireless News | dm***@rcrwireless.com | Verified |
A Antonio Gallucci Head of Business Development Moralis | Moralis | an***@moralis.io | Verified |
M Marine Néglot communications manager Pour de Bon | Pour de Bon | ma***@pourdebon.com | Verified |
N Natasha Brandt ceo Boligsiden | Boligsiden | p***@boligsiden.dk | Verified |
P Phil Harrington ceo youbloom | youbloom | p***@youbloom.com | Verified |
J Jacqueline Gurr Chief Operating Officer Global Fashion Group | Global Fashion Group | jac***@global-fashion-group.com | Verified |
M Maryann Curmi d j marketing director myMotherLode.com | myMotherLode.com | mar***@mymotherlode.com | Verified |
H Hannah Wilson Content Manager Gretchen Rubin Media | Gretchen Rubin Media | ha***@gretchenrubin.com | Verified |
D Dan Hicks Program Administrator County of Ventura | County of Ventura | dan***@ventura.org | Verified |
Showing 20 of 84,454 verified contacts
Refine to your ICP
Narrow these 84,454 contacts down to the ones that match your ideal customer profile.
No credit card required.
Job title distribution
// live data
How the MailOptin email list is built with Tomba
This isn’t a static file that quietly rots. Every list is assembled live from the Tomba API and verified before it reaches you: current, deliverable and ready to export in minutes.
- 01
Target
Pick your filters: industry, technology, job title, department, company size, country or US state. Tomba Reveal maps the companies that match.
- 02
Discover
Domain Search pulls the current decision-makers and their work emails from each matching company, live rather than from a recycled dump.
- 03
Verify
Every address is SMTP-checked and AI-scored the moment it is found, including catch-all (accept-all) domains most tools skip.
- 04
Export
Download fresh, verified contacts to CSV or your CRM, or pull them straight from the REST API. Built the moment you ask, so nothing is stale.
Why build this list with Tomba
AI-powered discovery
Machine-learning models rank and match the right people at the right companies, then predict the most likely deliverable pattern.
Catch-all verification
Tomba verifies catch-all (accept-all) domains that other providers mark “unknown”, so you can reach leads they cannot validate.
Verified before you send
Syntax, MX and SMTP checks plus catch-all detection keep bounces low, and every confirmed hard bounce earns a credit back.
Sources you can check
Every address comes from public web pages Tomba crawls, and the sources behind any email are one request away.
Pay only for results
If Tomba can’t find an email, the search is free: only searches that return a result use a credit.
API, SDKs & MCP
A REST API with 13 official SDKs, spreadsheet add-ons, and an MCP server to build this list straight into your AI tools and workflows.
// for developers and ai assistants
Build the MailOptin list with the Tomba API
Reveal the companies, Domain Search their live contacts, Verify every email (catch-all included), and Phone Finder for direct dials. Copy-paste in Go, JavaScript, cURL, or MCP.
// npm install tomba
import { TombaClient, Reveal, Domain, Verifier, Phone } from "tomba";
const client = new TombaClient();
client.setKey("ta_xxxx").setSecret("ts_xxxx");
const reveal = new Reveal(client);
const domain = new Domain(client);
const verifier = new Verifier(client);
const phone = new Phone(client);
// 1. Reveal: find companies for the MailOptin list
const { data } = await reveal.companiesSearch({
query: "companies using MailOptin",
page: 1,
});
for (const company of data.companies) {
// 2. Domain Search: pull live contacts + emails
const res = await domain.domainSearch({
domain: company.website_url,
limit: "20",
});
for (const contact of res.data.emails) {
// 3. Verifier: AI + catch-all verification (accept-all included)
const check = await verifier.emailVerifier(contact.email);
if (check.data.email.status !== "valid") continue;
// 4. Phone Finder: add a direct-dial number (5 credits)
const dial = await phone.finder({ email: contact.email });
console.log(contact.email, contact.position, dial.data?.intl_format);
}
}// go get github.com/tomba-io/go
package main
import (
"fmt"
"os"
"github.com/tomba-io/go/tomba"
"github.com/tomba-io/go/tomba/models"
)
func main() {
client := tomba.New(os.Getenv("TOMBA_API_KEY"), os.Getenv("TOMBA_SECRET_KEY"))
// 1. Reveal: find companies for the MailOptin list
companies, err := client.SearchCompanies(&models.RevealSearchRequest{
Query: "companies using MailOptin",
Page: 1,
})
if err != nil {
panic(err)
}
for _, company := range companies.Data.Companies {
// 2. Domain Search: pull live contacts + emails
res, err := client.DomainSearch(tomba.Params{
"domain": company.WebsiteURL,
"limit": 20,
})
if err != nil {
continue
}
for _, contact := range res.Data.Emails {
// 3. Verifier: AI + catch-all verification
check, _ := client.EmailVerifier(tomba.Params{"email": contact.Email})
if check.Data.Email.Status != "valid" {
continue
}
// 4. Phone Finder: add a direct-dial number (5 credits)
dial, _ := client.PhoneFinder(tomba.Params{"email": contact.Email})
fmt.Println(contact.Email, contact.Position, string(dial.Data))
}
}
}# export TOMBA_API_KEY=ta_xxxx TOMBA_SECRET_KEY=ts_xxxx
# 1. Reveal: find companies for the MailOptin list
curl -s -X POST https://api.tomba.io/v1/reveal/search \
-H "X-Tomba-Key: $TOMBA_API_KEY" \
-H "X-Tomba-Secret: $TOMBA_SECRET_KEY" \
-H "Content-Type: application/json" \
-d '{"query": "companies using MailOptin", "page": 1}'
# 2. Domain Search: pull live contacts from a company
curl -s "https://api.tomba.io/v1/domain-search?domain=piedpiper.com&limit=20" \
-H "X-Tomba-Key: $TOMBA_API_KEY" \
-H "X-Tomba-Secret: $TOMBA_SECRET_KEY"
# 3. Verify: AI + catch-all verification (accept-all included)
curl -s "https://api.tomba.io/v1/email-verifier/richard@piedpiper.com" \
-H "X-Tomba-Key: $TOMBA_API_KEY" \
-H "X-Tomba-Secret: $TOMBA_SECRET_KEY"
# 4. Phone Finder: get a direct-dial number for a contact (5 credits)
curl -s "https://api.tomba.io/v1/phone-finder?email=richard@piedpiper.com" \
-H "X-Tomba-Key: $TOMBA_API_KEY" \
-H "X-Tomba-Secret: $TOMBA_SECRET_KEY"{
"mcpServers": {
"tomba": {
"url": "https://mcp.tomba.io/mcp",
"headers": {
"Authorization": "Bearer <base64 of ta_key:ts_secret>"
}
}
}
}With the MCP server connected, ask your AI assistant:
“Use Tomba to find companies using MailOptin, pull their key contacts with domain_search, verify every email including catch-all domains, add direct-dial numbers with phone_finder, then export the MailOptin email list.”
Works in Claude, Cursor, Windsurf and any MCP client. The companies_search, domain_search, email_verifier and phone_finder tools run live. See the remote MCP docs.
Every address comes back with its verification status, catch-all domains included. See the Reveal, Domain Search and Verifier docs for full options.
// pricing
What does the MailOptin email list cost?
No per-list fees and no lock-in: you pay for the searches that return addresses, from $8.98 per 1,000 search credits.
On Pro Plus (50,000 a month). An Email Finder search that returns an address uses 1 credit; Domain Search uses 1 per 10 results.
Every address a search returns comes with its verification status, catch-all domains flagged, on the same search credit.
If Tomba finds no valid address, the search is free. The same search again in the same usage window is free too.
Start free: 25 search credits every 30 days, no card required.
Plans from 2,500 to 350,000 search credits a month, or one-time packs valid for 12 months. The REST API, 13 SDKs and the MCP server come with every plan.
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