Free Email Verification Tool
Free IP reputation check for VPNs, DataCenters, Bots and residential proxies.
Test Email addresses with an Email Reputation Check
Enter an email address to scan:
Why should I use a Email Validation?
Email validation is essential for cybersecurity as it helps prevent malicious actors from creating accounts with disposable or fake email addresses. By verifying email authenticity, organizations can reduce the risk of bot registrations, spam attacks, and fraudulent account creation that could compromise system security and data integrity.
24metrics Fraud Detection capabilities
We reliably detect Bots, DataCenters, Duplicates, Residential Proxies, Cookie Stuffing, Abnormal User Behaviour, Identification, Identification of TypoSquatters, Identification of Adult or Illegal Streaming Traffic Sources, TypoSquatting Detection
Click Fraud Detection
What is Click Fraud?
Click Fraud origins from automated Bots, Scripts, Malware often using Proxies or VPNs to hide the true location for the Fraudster. Their intent is to generate costs / revenue from fake clicks that are hard to identify for traditional tracking or fraud detection systems.
About 24metrics
AI Enabled Filters
AI enabled Filters
Bot Detection
Stop Bots hitting your website. Slowing it down, filling out fake forms or posting spam on your forum. 24metrics offers a complete CyberSecurity Solution for advanced Bot Detection
Form Protection
Our Plugin blocks VPNs and Data-Center IPs from accessing signup forms, preventing fake registrations and spam accounts. Security measures ensure only legitimate users are allowed.
Prevent Account Take Over
Block malicious users, hiding their identity causing problems in your community or even trying to access protected content through stolen credentials.
Why use 24metrics?
Affordable Entry Pricing
We have very affordable entry packages to literally any volume that you may have. Starting at 49 Euro we offer the most competitive pricing in the industry.
Many Supported Platforms
We are the platform with the most supported platforms. Integration can be installed in under 30min and is easy to use.
Transparent Rejection Reasons
We are an independent Fraud Prevention company with no hidden interests. We are on your side and our filters return transparent rejections reasons (e.g. Proxy, Bot, DataCenter, Emulator and more)
Enterprise Customizations and Consulting Options
We create tailored filters, deep system integrations, and custom detection models specifically for your business. We advise and implement on best practices in Fraud prevention and CyberSecurity matters.
The technology behind 24metrics
Of Raw Data from Clicks, Conversions and Impressions
Fault tolerant and low latency below <50ms
We have a large number of supported platforms.
uncovering hidden patterns across advertisers.
Frequently Asked Questions
Find answers to common questions about our product and services.
What is email validation and why do I need it?
Email validation is the process of verifying whether an email address is legitimate, deliverable, and safe to send messages to. Our email validity checker performs comprehensive real-time verification to ensure your email campaigns reach actual recipients.
Key Benefits:
- Reduce bounce rates by up to 98% and improve email deliverability
- Protect sender reputation and avoid blacklisting by ESPs
- Save money on email marketing costs by removing invalid addresses
- Increase engagement rates by targeting real, active email addresses
- Prevent fraud by detecting disposable and suspicious email addresses
- Maintain clean email lists for better campaign performance
How does email address verification work?
Our email checker performs multiple validation layers in real-time:
- Syntax Validation: Checks if the email follows proper formatting rules (RFC standards)
- Domain Verification: Validates the domain exists and has proper DNS/MX records configured
- SMTP Mailbox Verification: Connects to the email server to verify the specific mailbox exists and can receive emails
- Risk Assessment: Analyzes domain age, suspicious characteristics, and potential fraud indicators
- Blacklist Checking: Cross-references against major spam databases including Spamhaus ZEN and URIBL Black
- Advanced Detection: Identifies disposable emails, bot-generated addresses, Apple Hide My Email, and suspicious redirects
What types of invalid emails can your service detect?
Our comprehensive email validation API detects:
- Syntax errors – Malformed email addresses with incorrect formatting
- Non-existent domains – Email addresses with invalid or non-functioning domains
- Invalid mailboxes – Email addresses where the mailbox doesn’t exist on the server
- Disposable email addresses – Temporary email services like 10minutemail, guerrillamail
- Role-based emails – Generic addresses like info@, admin@, noreply@
- Spam traps – Honeypot emails designed to catch spammers
- Parked domains – Inactive domains that don’t accept email
- Bot-generated emails – Algorithmically created fake email addresses
- Blacklisted addresses – Emails flagged by major spam databases
- High-risk domains – Domains associated with fraudulent activity
How accurate is your email verification service?
Our email validation service achieves a 99% accuracy through:
- Real-time SMTP verification – Direct server connectivity testing
- Multi-layer validation – Combining syntax, domain, and mailbox checks
- Updated blacklist databases – Regular synchronization with major spam databases
- Machine learning algorithms – Continuous improvement of fraud detection
- Comprehensive domain analysis – Including age, reputation, and configuration checks
We provide detailed risk scores (0–100) and clear recommendations on whether to accept, review, or block each email address.
Can you verify email addresses without sending emails?
Yes! Our email verification process is completely non-intrusive and doesn’t send any emails to the addresses being validated.
How it works:
- We connect to the recipient’s mail server via SMTP
- Simulate the email sending process up to the delivery point
- Verify the mailbox exists without actually delivering a message
- Disconnect before sending any content
This approach ensures for your email lists while providing accurate deliverability verification.
Do you check email addresses against spam blacklists?
Absolutely. Our service cross-references every email against major spam blacklists and reputation databases including:
- Spamhaus ZEN – Combined blocklist (SBL+XBL+PBL)
- URIBL Black – Domain reputation database
- Additional proprietary databases for comprehensive coverage
We provide detailed blacklist status reporting, showing:
- Which specific blacklists flagged the address
- Type of listing (IP-based or domain-based)
- Description of why the address was flagged
This helps you avoid spam traps and maintain excellent sender reputation.
What is a disposable email address and why should I block them?
Disposable email addresses are temporary email accounts that expire after a short period (usually 10 minutes to 24 hours). Popular services include:
- 10minutemail.com
- guerrillamail.com
- tempmail.org
- Many others
Why block disposable emails:
- Low engagement – Users abandon these addresses quickly
- Wasted resources – Marketing to addresses that won’t exist tomorrow
- Fraud prevention – Often used for fake accounts and trial abuse
- List quality – Maintaining genuine, long-term subscriber relationships
Our system detects thousands of disposable email providers and is continuously updated.
How do you handle privacy and data security?
We take data privacy and security seriously:
- No email storage – We don’t store the email addresses you validate
- Encrypted connections – All API calls use HTTPS/TLS encryption
- GDPR compliant – Full compliance with European data protection regulations
- SOC 2 certified – Industry-standard security controls
- No third-party sharing – Your data stays confidential
Your email lists remain completely private and secure.