Email Verification

Verify Email Lists Quickly & Accurately

An easy-to-use SaaS application that allows you to quickly verify mailing lists. Upload your list, we verify, you download clean results. Simple as that.

How ClearBounce cleans a list before you send — 41 seconds.

How Email Verification Works

Three simple steps to clean email lists

1

Upload Your List

Upload CSV, Excel, or copy-paste your email list. We support files up to 10MB.

2

We Verify

Our proprietary engine runs deep checks — from DNS and SMTP probing to pattern analysis and spam trap detection.

3

Download Results

Get your verified list with detailed reports. Export as CSV with all verification data.

Comprehensive Verification Checks

Every email is analyzed by our AI-powered verification engine — layer by layer

01

Syntax & RFC Validation

The address has to follow the rules of email before anything else runs

02

DNS & MX Resolution

The domain must exist and point to real mail servers

03

Security Gateway Detection

Gateways like Mimecast or Proofpoint are recognised, and the check adapts to what sits behind them

04

Live SMTP Mailbox Handshake

A real conversation with the receiving server confirms the mailbox exists

05

Disposable & Parked Domains

Temporary email services and inactive parked domains are flagged

06

Provider-Specific Checks

Gmail, Microsoft 365, Yahoo and iCloud each get logic built for how they actually respond

07

Catch-All Behaviour Probe

Domains that accept every address are identified and risk-scored instead of trusted

08

Spam Trap & Honeypot Screen

Known traps that poison sender reputation never make it to your clean list

Plus role-account detection, typo rescue and AI pattern & risk scoring on every result.

What Your Results Mean

Four clear answers — and exactly what to do with each

results.csv
anna.keller@brightlabs.io DELIVERABLE
sales@vellum-corp.com RISKY
old.account@deastmail.com UNDELIVERABLE
mk@quietharbor.net DELIVERABLE
info@slowreply-gmbh.de UNKNOWN

Deliverable

The mailbox exists and accepts mail, confirmed by a real conversation with the receiving server. Safe to send.

Risky

The address works, but something lowers confidence — a catch-all domain, a full mailbox, a temporary-looking setup. Send selectively.

Undeliverable

The mailbox doesn't exist or the domain can't receive mail. Remove — every send is a guaranteed bounce.

Unknown

The receiving server wouldn't give a definitive answer in time. Fewer than 2% of results. Re-verify later or treat as risky.

A stream of emails passing through a glowing filter: valid ones reach the inbox, invalid ones are deflected

Why Verify Before You Send?

Protect your sender reputation

A high bounce rate tells mailbox providers you don't know your own list — and that reputation sticks to your domain long after the campaign ends.

Land in the inbox, not spam

Cleaning invalid addresses before a send improves placement for everyone left on the list — the same message, delivered where it gets read.

Stop paying for dead addresses

Most email platforms bill by contact count. Every invalid address you carry costs you money each month and skews every metric you report.

Ready to Clean Your Email Lists?

Start with 100 free credits. No credit card required.

Get Started Free