Free Online Email Privacy Checker
Quickly check if your email address has been exposed in known public data breaches. Audit domain authentication records (SPF, DMARC) and analyze domain-level email security configurations.
Why Check Your Email Privacy?
Major websites and services occasionally suffer data breaches, exposing user credentials. Knowing if your email is part of these datasets can help you secure your online accounts proactively.
The HIBP Standard
Our tool integrates with Have I Been Pwned?, a widely used public database of documented data breaches. By checking your email address against this resource, you can identify which historical leaks included your information and see what type of data was exposed.
Domain Authentication
Beyond breaches, we audit whether the domain configures authentication protocols like SPF, DMARC, and MTA-STS to help reduce spoofing risks and signal delivery validation rules to receiving mail servers.
Disposable & Known Alias Detection
Identify if an email address belongs to a temporary "burner" service or a known privacy forwarding alias. This can be helpful for assessing registration quality and identifying temporary accounts.
IPv4 DNSBL Blacklist Checks
We resolve the domain's Mail Exchange (MX) servers and check their IP addresses against major diagnostic DNSBLs like Spamhaus and SpamCop. A blocklist listing can increase the likelihood that mail from the IP will be filtered, delayed, or rejected by systems that use that blocklist.
Email Privacy Checker Tool
Email Security Standards
Understanding the DNS records that indicate how email domains verify sender legitimacy and transit rules.
| Protocol | Implementation | Security Impact |
|---|---|---|
| SPF | A DNS TXT record listing the IP addresses authorized to send mail for the domain. | Specifies authorized sending hosts for the domain, providing an authentication signal used by receiving mail systems. |
| DKIM | Adds a cryptographic signature to the email headers, verified via a public key in DNS. | Helps verify that a message was signed by the domain and that signed content was not modified after signing. |
| DMARC | A DNS policy that tells receiving servers what to do if SPF or DKIM fails (e.g., p=reject). | Helps reduce domain spoofing by instructing receiving systems how to handle messages that fail SPF or DKIM checks. |
| MTA-STS | Allows domains to publish a strict HTTPS policy requiring TLS encryption for all inbound mail. | Helps protect mail delivery against transit downgrade attacks by allowing participating receiving systems to require TLS. |
| DANE / TLSA | Uses DNSSEC to publish the exact TLS certificates expected by the mail server. | Uses DNSSEC and TLSA records to associate a mail service with expected TLS certificate characteristics. |
Understanding Privacy Metrics
Key technical configurations that help determine the routing, identity structure, and public status of an email address.
Domain Status & MX Records
Before an email can be delivered, the domain must have valid Mail Exchange (MX) records pointing to active servers. Missing MX records can indicate that the domain is not configured to receive mail through standard MX routing.
Provider Classification
We classify the domain type as a Consumer Provider (Gmail, Yahoo), a Custom Domain, or a Role-Based address (info@, admin@). Custom domains suggest an independent host, while role-based addresses typically manage team operations.
Forwarding & Alias Services
Services like SimpleLogin, DuckDuckGo, or Apple Private Relay can mask the user's underlying destination inbox. While effective for safeguarding personal privacy, they can affect direct relationship validation workflows.
Breach Exposure (HIBP)
A breach match means that HIBP has associated the email address with one or more known data breaches. The exposed variables depend on the specific breach database.
Honest by Design — What This Tool Does
This tool performs server-side DNS queries to inspect public email infrastructure records. Here is exactly what it does and doesn't do:
- Checks public DNS records (MX, SPF, DMARC, MTA-STS, DANE).
- Queries the Have I Been Pwned database for breach history.
- Identifies disposable, alias, and role-based email providers.
- Does NOT send active validation emails to addresses.
- Does NOT intentionally store submitted email addresses in its application data.
- Does NOT scan raw email content or attachments.
This tool does
- Inspect MX and DNS configuration
- Check HIBP breach database
- Detect disposable & alias domains
- Audit SPF, DMARC & MTA-STS
- Export technical JSON reports
- Assess infrastructure without local data retention
This tool does not
- Send active validation emails to addresses
- Crack or verify passwords
- Scan raw email headers/attachments
- Bypass SMTP privacy protections
- Does NOT intentionally store your search queries
- Require an account or login
How to Use This Checker
Four steps to audit your email's security posture and breach history.
Enter Email
Input the full email address you want to audit (personal, work, or a vendor's contact).
Run Audit
The checks are performed server-side, so your browser does not directly query the DNS or HIBP services.
Review Status
Instantly see color-coded badges for MX validity, authentication protocols, and breach exposure.
Take Action
If breached, change passwords immediately. If DMARC is missing, update your domain's DNS records.
Email Security Pitfalls
Avoid these common email security mistakes that leave your inbox and domain vulnerable to compromise.
Ignoring DMARC Policies
Leaving your domain's DMARC policy unconfigured or set to p=none, which instructs receiving servers to apply default delivery routing even if domain spoofing is detected.
Fix: After monitoring legitimate mail and resolving any authentication alignment issues, organizations can consider moving the policy to quarantine or reject to minimize unauthorized domain usage.
Password Reuse Across Breaches
Using the same password on a minor forum that gets breached, allowing hackers to try that credential on your primary email or banking accounts.
Fix: Use a Password Manager to generate unique, complex passwords for every single service. Enable 2FA/MFA everywhere possible.
Trusting Disposable Emails
Allowing users to sign up for your SaaS or service using temporary "burner" emails, which can increase low-quality or short-lived registrations and make account recovery harder.
Fix: Implement disposable email domain checks to encourage standard address sign-ups and reduce unauthenticated contact profiles.
Clicking "Show Original" Links
Forwarding raw email headers to third-party "analyzer" websites that may log or steal sensitive authentication tokens and private data.
Fix: Only analyze raw headers using trusted, open-source local tools or verified enterprise security platforms. Never paste raw headers into random web forms.
Downloading Unverified Attachments
Opening PDFs, Word docs, or ZIP files from unknown senders, which often contain hidden macros or executables that install ransomware.
Fix: Never enable macros. Use a sandboxed environment or an online malware scanner to inspect attachments before opening them on your main machine.
Ignoring Forwarding Aliases
Assuming an email from a "privaterelay.appleid.com" or "duck.com" address is a standard user, complicating account recovery and communication.
Fix: Recognize how routing systems redirect aliases, and ensure recovery pipelines are configured to handle forwarded addresses properly.
Privacy vs. Other Email Tools
Which diagnostic tool should you use for your current email security task?
Who Uses Email Privacy Tools?
High-impact scenarios for auditing personal security and verifying sender authenticity.
Personal Security Audit
Regularly checking your personal and work email addresses to stay informed about potential exposures. Early detection can help you secure affected accounts sooner.
Post-Breach Verification
When news breaks that a major company (like LinkedIn or Adobe) was hacked, instantly check whether your email address appears in the known breach data associated with that incident.
Vendor & Lead Verification
Sales teams and B2B marketers inspect whether a lead's email domain has valid mail configuration and authentication records before spending time on outreach.
Phishing Email Signals
IT teams inspect the configuration of incoming senders. Missing records or listing flags can provide additional warning signals when investigating suspicious messages.
Privacy Alias Management
Privacy advocates check their forwarding aliases (SimpleLogin, DuckDuckGo) to ensure the underlying routing domains are healthy and not flagged as spam by major ISPs.
SaaS Registration Filtering
Developers can implement similar validation logic in registration workflows to filter disposable domains, to reduce registrations from known disposable email domains.
Email Privacy FAQs
Straight answers about data breaches, authentication, and digital security.
Why does this tool sometimes open "Have I Been Pwned"?
The check does not store your submitted email address. When the HIBP API is enabled, the submitted email address is sent to HIBP for the breach lookup. The tool does not intentionally store the address in its application database.
My email was found in a breach! What should I do?
Don't panic. First, change your password on the breached website immediately. If you reused that password elsewhere, change it there too. Most importantly, enable Two-Factor Authentication (2FA) on all critical accounts (email, banking) using an authenticator app, passkey, or another strong verification method supported by your provider.
What does "Missing DMARC" mean for my domain?
If DMARC is missing, receiving servers do not have a DMARC policy from your domain to apply. If DMARC is configured with p=none, the policy is primarily used for monitoring rather than requesting quarantine or rejection of messages that fail DMARC evaluation. After monitoring legitimate mail and resolving authentication alignment issues, moving your policy to p=quarantine or p=reject can help reduce unauthorized use of your domain.
Is a "Disposable" email always bad?
Not necessarily for personal privacy, but they can cause support and account-recovery challenges if used for primary corporate or service profiles. Some platforms block disposable email domains during registration.
Can this tool read my private emails?
No. This tool only reads public DNS records (like a phonebook) and queries public breach databases. It does not have access to your inbox, cannot read your messages, and cannot scan your attachments. Raw email content analysis requires a local email client plugin.
What is MTA-STS and how does it help?
MTA-STS (Mail Transfer Agent Strict Transport Security) helps protect mail delivery against transit downgrade attacks by allowing participating receiving systems to require TLS.
Why is my domain listed on a DNS Blacklist?
If your domain's mail server IP is on a blacklist like Spamhaus, it typically indicates that the mail server's IP has met the listing criteria for that blacklist. A blocklist listing can increase the likelihood that mail from the IP will be filtered, delayed, or rejected by receiving servers utilizing that list.
Is my data private and secure?
This tool is designed not to store or retain submitted email addresses in its application data. The check process is ephemeral and returns the results directly to your browser.