---
title: "EmailShield — Email Verification & List Cleaning | 99.8% Accuracy"
description: "Email verification with 99.8% accuracy. Multi-port SMTP checks, catch-all detection, blacklist monitoring, and DMARC reporting. Plans from $19/mo for 10K verifications. 40K free credits to start."
canonical: "https://emailshield.co/"
last-updated: "2026-08-23"
---

> Email verification with 99.8% accuracy. Multi-port SMTP checks, catch-all detection, blacklist monitoring, and DMARC reporting. Plans from $19/mo for 10K verifications. 40K free credits to start.

# Unmatched accuracy in email verification

EmailShield guarantees 99.8% verified accuracy, so every email you send protects your reputation and reaches a real inbox.

EmailShield verifies email addresses by opening real SMTP handshakes rather than performing DNS-only lookups, and classifies catch-all domains instead of guessing at them. Around that sits a deliverability toolkit: blacklist monitoring across 100+ global lists, DMARC report analysis, and domain monitoring. Verification runs on EmailShield's own self-hosted proxy infrastructure with zero third-party calls, so lists never leave the network.

New accounts start with 40,000 free credits. Paid plans run from $19/month for 10,000 monthly credits. EmailShield is a [Scaling Room](https://maildeck.co) product and is currently in an invite-only closed beta — see [early access](https://emailshield.co/soon) below.

## Core capabilities

- **Verified accuracy — 99.8%.** Real SMTP handshakes instead of DNS-only lookups. Catch-all domains are classified, not guessed. The site compares this against 94.1% and 91.3% for the two legacy tools it benchmarks.
- **Speed.** Sub-2-second single verification; 100k/minute in bulk. A real-time API for signup forms, and webhook-driven bulk jobs for list hygiene — no polling, no timeouts.
- **Own infrastructure.** Self-hosted proxies and zero third-party calls, so your data never leaves the network. Rotating egress IPs stop providers rate-limiting your checks.
- **Price per email — from $0.00018.** Pay-as-you-go, with plans from $19/mo. The site quotes $0.00449 per email for MillionVerifier as the comparison point.
- **Developer experience.** One endpoint, SDKs for Python, Node and PHP, an OpenAPI 3.0 spec, signed webhooks and idempotent retries.
- **Data protection.** Every list is processed on EmailShield's own infrastructure and encrypted in transit and at rest.

## The platform

Live now:

- **Blacklist Monitoring** — real-time monitoring of domains and IPs across 100+ global blacklists, instant alerts on listing and delisting, and delisting guidance with direct links.
- **Contact Verification** — the core multi-port SMTP verification engine, including catch-all classification.
- **DMARC Monitoring** — DMARC report analysis, sending-source reporting and failure alerts.

Announced but not yet released: Email Tester, Inbox Placement, Spam Checker.

Full breakdowns and technical specs for each tool are on the [features page](https://emailshield.co/features.md).

## For developers

A REST API with webhooks for async bulk processing and SDKs for Python, Node.js and PHP. Real-time verification returns in under 2 seconds; bulk jobs run at 100k+ emails per minute.

    import emailshield
    client = emailshield.Client(api_key='sh_live_1234')
    result = client.verify('john@doe.com')
    if result.status == 'valid':
        print(f"Accuracy: {result.score}%")

API reference, SDKs and webhook documentation: [developers](https://emailshield.co/developers.md).

## How EmailShield compares

| | EmailShield | ZeroBounce | MillionVerifier | Hunter |
|---|---|---|---|---|
| Price per 100k emails | $49 | $800 | $449 | $2.8K/mo |
| Real SMTP check | yes | no | no | no |
| DMARC monitoring | yes | no | no | yes |

Price comparison based on publicly available data as of May 2026.

At 100,000 emails per month the pricing calculator quotes $49/mo, or $0.00049 per email — a saving of $751 against ZeroBounce, $400 against MillionVerifier and $2,751 against Hunter at the prices above.

## Pricing

40,000 free credits for all new accounts. Every plan is billed monthly with no commitment.

| Plan | Price | Monthly credits | Adds |
|---|---|---|---|
| Starter | $19/mo | 10,000 | Full scan diagnostics, bulk uploads |
| Growth | $29/mo | 50,000 | Domain monitoring, blacklist & DMARC |
| Plus | $49/mo | 100,000 | Priority queue, advanced analytics |
| Pro | $149/mo | 500,000 | Dedicated support, custom exports |
| Scale (most popular) | $249/mo | 1,000,000 | Custom integrations, priority engineering |
| Scale Max | $1,797/mo | 10,000,000 | Dedicated infrastructure, white-glove onboarding |
| Custom | quoted | volume pricing | Dedicated infrastructure, custom SLAs |

One-off credit packs are priced at $19 for 10K, $29 for 50K, $49 for 100K, $159 for 500K, $269 for 1M, $1,149 for 5M and $1,979 for 10M. Self-serve purchase of extra credits is not live yet — packs are granted manually on request via [contact](https://emailshield.co/contact.md).

Full plan detail: [pricing](https://emailshield.co/pricing.md).

## Frequently asked questions

**What makes EmailShield unique?** We own our proxy infrastructure and developed a custom multi-port SMTP engine from scratch, ensuring total independence and reliability.

**Do you handle catch-all domains?** Yes. Our multi-port intelligence (ports 25, 465, 587) allows us to perform deeper handshakes than standard API-based checkers.

**How does multi-port SMTP verification work?** Most checkers only use port 25. EmailShield queries ports 25, 465, 587, and 2525 simultaneously to bypass ISP blocks and confirm mailbox existence.

**How does EmailShield handle and protect my data?** Your data is processed entirely on our own infrastructure with zero third-party verification calls, so it never leaves our network. Everything is encrypted in transit and at rest, with least-privilege access and continuous monitoring.

**Can I integrate EmailShield with my CRM?** Absolutely. We offer a robust REST API, webhooks, and native SDKs for Python, Node.js, and PHP to automate verification in any workflow.

**What is the "brand tax" in email verification?** Legacy tools charge premium prices for basic technology. EmailShield provides superior multi-port intelligence at 70% lower cost by owning our infrastructure.

More questions — accuracy guarantees, whether verification affects your sender reputation, and how EmailShield differs from a single-stage verifier — are answered on the [FAQ page](https://emailshield.co/faq.md).

## Early access

EmailShield is in an invite-only closed beta covering the verification engine and the wider toolkit. Request an invite from the [early access page](https://emailshield.co/soon.md).

## Technical field reports

Deep dives into the infrastructure behind modern email deliverability and verification.

- [Sender Reputation Management: How to Protect Inbox Placement Before It Slips [2026]](https://emailshield.co/blog/sender-reputation-management) — sender reputation slips before it collapses, and the early signals sit in bounce rate, spam complaints and DNSBL listings. Covers 60 DNSBLs monitored, live SMTP verification, and catch-all classification across 8.19M+ verified addresses.
- [Email Verification vs Validation: What Actually Gets Checked and Why It Matters [2026]](https://emailshield.co/blog/email-verification-vs-validation) — validation checks format and DNS; verification opens a live SMTP handshake to confirm the mailbox exists. Across 8.19M verified addresses, 22.3% of "validated" B2B emails are still dead.
- [Email Verification in Node.js: Real-Time Signup Validation Without False Positives [2026]](https://emailshield.co/blog/email-verification-node-js) — DNS-only Node.js libraries pass catch-all and Microsoft 365 addresses as valid, so signup lists still bounce 7%+. How to run real SMTP-handshake verification with the Node SDK.

Every report: [blog](https://emailshield.co/blog.md).

## Elsewhere in Scaling Room

- [MailDeck](https://maildeck.co) — cold email inboxes and sending infrastructure.
- [LeadSonar](https://leadsonar.io) — lead sourcing and B2B data.

## Contact

Migration help, list imports and a first SMTP sweep are handled by the team — see [contact](https://emailshield.co/contact.md). Security and data-handling detail is on the [security page](https://emailshield.co/security.md).

Machine-readable version of this page: [index.md](https://emailshield.co/index.md). Site-wide summary for agents: [llms.txt](https://emailshield.co/llms.txt).