---
title: "uChecker — Bulk email verification plus 13 free DNS and auth tools"
source: https://listmaro.com/tools/uchecker
description: "uChecker checks large email lists and returns Good, Bad, Risk, and Unknown groups. Unknown addresses are not counted as valid. The full mailbox-server…"
updated: 2026-08-17
---

# uChecker

> Bulk email verification plus 13 free DNS and auth tools

- **Website:** https://uchecker.net
- **Pricing:** Freemium
- **Categories:** [Security](https://listmaro.com/categories/security)
- **Upvotes:** 0
- **Listed:** 2026-08-17
- **Last reviewed:** 2026-08-17
- **Last updated:** 2026-08-17
- **Submitted by:** [M Avreliy](https://listmaro.com/makers/m-avreliy)
- **Placement:** Editorial listing — not paid for

## About uChecker

uChecker checks large email lists and returns Good, Bad, Risk, and Unknown groups. Unknown addresses are not counted as valid. The full mailbox-server reply is kept, so you can see if an inbox was deleted, frozen, or full. Lists go in as txt or csv, up to 9 million addresses per job, about 3200 per minute. There is a web dashboard, a REST API, and a Telegram bot. Thirteen DNS tools stay free with no account: SPF, DKIM, DMARC, MX, BIMI, MTA-STS, TLS-RPT, plus generators and a domain health check. Cyprus.

## Why it belongs in these categories

- **Security (primary):** Security is a useful buyer category because uChecker checks email infrastructure, DNS/MX records, SMTP responses, and public blocklists before sending. It helps reduce bounce-related damage and sender-reputation risk. The reviewed site presents it as an email hygiene and validation service, not a malware, credential-theft, or unauthorized-access product.

## What uChecker does

- **Bulk email validation** — Checks lists up to 9 million addresses and groups results into Good, Bad, Risk, and Unknown.
- **SMTP and DNS checks** — Uses syntax, DNS/MX, and SMTP validation without sending a test email.
- **Detailed result reasons** — Keeps the mail-server response so users can see whether a mailbox is deleted, frozen, or full.
- **Multiple access paths** — Provides a web dashboard, REST API, and Telegram bot.
- **Free DNS toolkit** — Offers SPF, DKIM, DMARC, MX, BIMI, MTA-STS, TLS-RPT checks plus generators and domain health tools.
- **Exportable results** — Downloads cleaned lists as an archive or exports JSON/CSV with reasons.

## Who it’s for

Best suited to email marketers, B2B teams, and product teams that need to clean a list before sending. It also fits developers who want API access or teams maintaining sender reputation. Skip it if you need proof of subscriber consent or a tool that sends campaigns; uChecker validates technical deliverability signals, not permission to contact people.

## What it costs

Free — up to 100 addresses. Paid validation starts at 0.20 ₽ per address for 1,000 addresses (200 ₽), drops to 0.15 ₽ at 25,000–100,000, 0.08 ₽ at 200,000, and 0.05 ₽ from 500,000 addresses. The website also lists 1,000,000 addresses at 50,000 ₽. No bank card is required for the first 100 addresses.

## About this data

List Maro is an early-stage, human-reviewed directory of SaaS products — nothing is published automatically. Numbered category rankings appear only after the published evidence thresholds are met; promoted placements are labelled and kept separate from organic ordering.

- **Canonical page:** https://listmaro.com/tools/uchecker
- **Publisher:** List Maro (https://listmaro.com/)
- **Machine index:** https://listmaro.com/llms.txt
- **JSON API:** https://listmaro.com/api/public/openapi.json
- **Methodology:** https://listmaro.com/methodology