Email Breach Check
Check whether an email address appears in public breach data and get clear next steps
Check Email Exposure
Enter an email address to see whether it appears in known public data breaches.
What to Do Next
- Change passwords for affected services and any account that reused the same password.
- Turn on multi-factor authentication for email, banking, cloud, and admin accounts.
- Use a password manager to generate unique passwords for every account.
- Watch for phishing messages that reference old passwords or breach details.
Related Security Tools
If you are investigating a suspicious email, combine this lookup with our Mail Security Check and URL Defang Tool.
Need help responding to account compromise? Contact Network Thinking Solutions for incident response and account hardening support.
Why Check an Email Address for Data Breaches?
An email address is often the key that connects your online accounts. When it appears in a data breach, criminals may pair it with exposed passwords, phone numbers, names, or other personal information to attempt account takeovers, credential-stuffing attacks, and convincing phishing messages. A regular email breach check gives you an early signal that it is time to update passwords and strengthen account security.
How the Email Breach Check Works
Your email address is sent through our secure server-side lookup to a database of publicly reported breaches. The search compares the address with indexed exposure records and returns available details such as the affected service, breach date, exposed data categories, and password risk.
The check does not reveal passwords or the underlying leaked records. A result means the address was associated with a known incident; it does not necessarily mean the account is currently compromised.
Understanding Your Results
If exposure is found, prioritize changing any password used on the affected service and every account where that password was reused. Enable multi-factor authentication, review recovery details, and watch for unexpected sign-ins or targeted phishing.
A clear result means no match was found in the data checked today—not that an address has never been exposed. Some incidents are undiscovered, unreported, or not yet indexed, so strong unique passwords and multi-factor authentication remain essential.
How XposedOrNot Supports This Search
XposedOrNot collects and indexes information about publicly disclosed data breaches so people can identify where an email address may have been exposed. Network Thinking Solutions queries that data through a server-side connection and presents the available findings with practical security guidance.
Breach databases are an awareness tool, not a complete security audit. Use the findings as a starting point for password hygiene, multi-factor authentication, phishing awareness, and professional incident response when suspicious account activity is present.