Clean Your Email List Before You Hit Send

Upload a CSV or Excel file. Get verified results in minutes. Remove the bounces, spam traps, and dead addresses that hurt your sender reputation.

upload_file Drop in your file — we handle the rest.: Truelist auto-detects the email column and starts verifying immediately. No reformatting, no column mapping, no wasted time.
speed 100,000 emails verified in under 30 minutes.: Most lists finish in minutes, not hours. And with Enhanced Validation, you get up to 2x more accurate results on tricky catch-all domains.
download Export exactly what you need.: Download your clean list with one click. Filter by status, remove invalids, and get detailed reason codes so you know exactly why each email passed or failed.

Verify List

Your Lists

Website Signups.csv

0 of 8,127 emails verified

Completed

List Name	Emails	Uploaded
Q1 Newsletter	12,450	Jan 15, 2026	Download
Conference Leads	3,892	Jan 12, 2026	Download

Use cases

When to verify your list

Email lists decay at 22% per year. Here's when bulk verification pays off the most.

calendar_month Before major campaigns: Product launches, seasonal promotions, or important announcements — verify before you send to maximize deliverability and protect your sender reputation.
sync_alt Switching email providers: Migrating to a new ESP? Clean your list first. Starting fresh with verified emails means better engagement metrics from day one.
hourglass_empty After 6+ months of inactivity: Haven't emailed a segment in a while? Re-verify before re-engaging. Old lists are bounce rate landmines waiting to hurt your deliverability.
download Importing purchased or scraped lists: Third-party data is risky. Always verify before importing to your ESP. One bad batch can tank your sender reputation for months.

Simple 3-step process

How it works

Upload your file

Drag and drop a CSV or Excel file. We auto-detect the email column — no formatting required.

We verify every email

Syntax checks, domain verification, mailbox validation, and spam trap detection. 100K emails in under 30 minutes.

Download clean results

Get your verified list with status codes, risk scores, and reason codes. Export valid emails with one click.

Detailed results

What you get in your report

Every email is categorized with a clear status and detailed reason codes so you know exactly what to do.

check_circle

Valid

Safe to send. The mailbox exists, accepts mail, and shows no signs of being a spam trap or disposable address.

cancel

Invalid

Do not send. The email will hard bounce — bad syntax, domain doesn't exist, or mailbox not found.

warning

Risky

Proceed with caution. Catch-all domains, role-based addresses, or temporary mailboxes that may cause issues.

Verification Details

Weed out bad emails before you send

Protect your brand by removing emails that are likely to bounce, which could harm your sender reputation.

SMTP Validation: Validate domains and query SMTP servers to remove invalid, inactive, parked domains, and invalid accounts.
Spam trap checking: Clean spam traps to improve your reputation score and avoid being identified as a spammer.
DNS record checking: Ensure that an email's DNS and MX records are valid.
Disposable emails: Identify and remove disposable email domains from your lists.
Duplicates removal: Identify and remove duplicate emails from your lists.
Accept-all domains: Spot and flag domains that accept any email addresses.

Explore more features

Discover other powerful capabilities Truelist offers.

webhook

Developer API Full featured, robust API

monitoring

Advanced Reporting Industry-leading analytics and insights

neurology

Enhanced Validation Maximum accuracy with advanced heuristics

extension

Chrome Extension Verify emails on any webpage

sync

Recurring Validation Keep your lists clean automatically

Ready to put Truelist
to the test?

Find out if Truelist is right for you in under 10 minutes.

Free plan available. No credit card required.

FAQ

Frequently asked questions

Can't find the answer you're looking for? Reach out to our customer support team.

What is Truelist?: Truelist is a cutting-edge email validation service designed to improve the accuracy and deliverability of your email campaigns by verifying email addresses in real-time and cleaning email lists.
How does Truelist validate email addresses?: Our service uses advanced algorithms and real-time checking to validate email addresses. This includes checking for format correctness, domain validity, and whether the email address is active and accepting mails.
What are the benefits of using Truelist for email validation?: By using Truelist, you can reduce bounce rates, avoid spam traps, improve your sender reputation, and ultimately increase the effectiveness of your email marketing efforts.
Is it really unlimited?: Yes, Truelist offers unlimited free email validation in our platform.
Is Truelist compliant with data privacy regulations like GDPR?: Yes, we prioritize data security and compliance with global privacy laws, including GDPR. Truelist is SOC 2 Type II certified, meaning our security controls are independently audited and verified. We ensure that all data is handled securely and with the utmost respect for privacy. Learn more about our security practices.
Does Truelist have an API?: Yes, we have a powerful API that allows you to integrate Truelist into your own applications and services. You can find our API documentation here.