---
title: "FAQ — EmailShield"
description: "Frequently asked questions about EmailShield."
canonical: "https://emailshield.co/faq"
last-updated: "2026-08-22"
---

> Frequently asked questions about EmailShield.

EmailShield [EmailShield](https://emailshield.co/)

FAQ

# Frequently asked questions

Common questions about EmailShield — answered.

How accurate is EmailShield verification?

EmailShield guarantees 99.8% verified accuracy across the standard inbox, business, and catch-all categories. Every address is processed through a four-stage pipeline before a result is returned.

Will verifying my list hurt my sender reputation?

No. EmailShield runs SMTP probes through a rotating pool of 1,200+ verification IPs that are isolated from any sending infrastructure. Your domain and sending IPs are never touched.

What's the difference between EmailShield and a single-stage verifier?

Most verifiers stop after a single SMTP handshake. EmailShield combines syntax/DNS checks, catch-all and disposable detection, careful SMTP probing, and historical inbox-rate scoring from a 1,200-domain network — producing a confidence score with explanations, not just a binary verdict.