Validate every email
before you hit send
A simple, reliable way to validate, clean, and protect your email lists so your messages reach the inbox, not the bounce folder.
Features
Everything you need for clean, deliverable lists.
Powerful validation. Developer friendly. Built for growth.
Real-time Validation API
Validate emails instantly with our real-time API, or through our website. Get accurate results in milliseconds.
Bulk Email Validation API
Upload CSV, TXT, XLS, or XLSX lists and clean thousands of emails in minutes with our bulk API, or through our website.
Advanced Checks
We check syntax, domain, MX records, catch-all, disposable emails, spamtraps, role-based addresses, and more.
Allow and Block Lists
Always accept or reject specific emails and domains before validation runs. Keeping your lists clean and token usage low.
What we look for
A full picture of every email you check.
MailBeacon runs each address through layered checks so you get a clear status, a reason, and the context you need to make a decision.
Syntax & format
Catch typos, invalid characters, and malformed addresses before they hit your database.
Domain & MX records
Verify the domain exists and is configured to receive mail with valid MX records.
Mailbox existence
An SMTP handshake confirms whether the actual inbox can accept mail.
Disposable & temporary
Spot throwaway addresses from temporary mail providers used to dodge real signups.
Catch-all & risky
Identify catch-all domains and addresses we flag as risky so you can route them differently.
Typo suggestions
When we spot a likely typo, we suggest a correction like gmial.com to gmail.com.
How it works
Get up and running in minutes
From signup to your first validated email in four steps.
- 01
Create your account
Sign up free and get 100 welcome tokens to start validating right away.
- 02
Generate an API key
Create a key in the dashboard and authenticate with a simple Bearer token.
- 03
Validate emails
Call the real-time API or upload a list for bulk cleanup in one request.
- 04
Protect deliverability
Keep invalid and risky addresses out of your campaigns and signup flows.
Ready to improve your deliverability?
Create a free account, get 100 welcome tokens, and start validating in minutes.