Free Domain Reputation Checker
Check any domain for disposable email providers, MX records, and safety — instantly. No signup required.
gmail.com
Risk Score: 0/100
AcceptDisposable
- Not disposable
Mail Server
- MX records found
MX Records
| Priority | Mail Server |
|---|---|
| 5 | gmail-smtp-in.l.google.com |
| 10 | alt1.gmail-smtp-in.l.google.com |
| 20 | alt2.gmail-smtp-in.l.google.com |
| 30 | alt3.gmail-smtp-in.l.google.com |
| 40 | alt4.gmail-smtp-in.l.google.com |
A Records
- 142.250.177.229
Want to check domains at scale?
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How It Works
Enter a domain
Type or paste any domain name into the checker above.
We run the checks
Fidro checks MX records, DNS resolution, and scans our disposable email database for a match.
Get your results
See a risk score, detailed DNS records, disposable status, and a clear recommendation: accept, review, or block.
What We Check
Every domain is run through multiple checks to give you a complete reputation picture.
Disposable Detection
Cross-referenced against thousands of known temporary and disposable email providers.
MX Record Verification
DNS lookup to confirm the domain has mail servers configured and can actually receive email.
DNS Resolution
Resolves A records to verify the domain points to real IP addresses and has active DNS infrastructure.
Risk Scoring
All checks feed into a weighted 0-100 risk score with a clear recommendation: accept, review, or block.
How Disposable Email Domains Work
Disposable email services operate by registering domains and setting up catch-all mail servers that accept email sent to any address at that domain. Services like Mailinator, Guerrilla Mail, and 10MinuteMail allow anyone to create a temporary inbox in seconds — no registration, no verification, no real identity required.
Some services use a single well-known domain, while others rotate through hundreds or even thousands of domains to evade detection. More sophisticated providers generate new domains regularly, making it a constant challenge to maintain an up-to-date blocklist. Fidro tracks over 200,000 disposable domains and updates the list daily.
These services are problematic for businesses because they enable free-tier abuse (creating unlimited trial accounts), fake signups that inflate user metrics, spam and bot activity, and bypassing email verification flows designed to confirm real contact information. By checking domain reputation at the point of signup, you can block these throwaway addresses before they enter your system.
Why Check Domain Reputation
Data quality. When users sign up with disposable or invalid domains, your user database fills with unreachable contacts. This skews analytics, inflates user counts, and wastes resources on accounts that will never convert. Domain checking at signup ensures every email address belongs to a real, functioning domain.
Fraud prevention. Disposable domains are a top signal for fraudulent activity. Attackers use them to create throwaway accounts for free-tier abuse, promotional code exploitation, fake reviews, and credential stuffing. Blocking suspicious domains at registration is one of the most effective anti-fraud measures available.
Email deliverability. Sending emails to domains without valid MX records results in hard bounces, which damage your sender reputation. Email providers like Gmail, Outlook, and Yahoo track your bounce rate — a high rate can land your legitimate emails in spam folders. Validating domains before sending protects your deliverability.
Compliance. Many industries require verified contact information for regulatory compliance. Financial services, healthcare, and e-commerce platforms need to confirm that user-provided email addresses are real and reachable. Domain reputation checking is a foundational part of KYC (Know Your Customer) and identity verification workflows.
Frequently Asked Questions
What is domain reputation?
Domain reputation is a measure of how trustworthy a domain is based on its DNS configuration, mail server setup, association with disposable email services, and other risk signals. A domain with valid MX records, proper DNS resolution, and no ties to temporary email providers has a strong reputation.
How do I check if a domain is safe?
Enter the domain into this free checker. Fidro will verify its MX records, check DNS resolution, scan it against our database of disposable email providers, and calculate a risk score from 0 to 100. A low score means the domain is safe; a high score indicates potential issues like missing mail servers or association with throwaway email services.
What is a disposable email domain?
A disposable email domain is one operated by a temporary email service like Mailinator, Guerrilla Mail, or 10MinuteMail. These services let anyone create throwaway inboxes without providing real contact information. Businesses block disposable domains because they are commonly used to abuse free tiers, create spam accounts, and bypass email verification.
What are MX records?
MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for receiving email on behalf of a domain. If a domain has no MX records, it cannot receive email. MX records include a priority value — lower numbers indicate higher priority, so mail is delivered to the preferred server first.
Why should businesses check domain reputation?
Checking domain reputation helps businesses maintain clean user data, prevent fraud, and improve email deliverability. By blocking signups from disposable or suspicious domains, you reduce fake accounts, free-tier abuse, and spam. It also protects your sender reputation by ensuring you only send emails to domains that can actually receive them.
Is this domain checker free?
Yes, this tool is completely free with no signup required. For higher-volume needs, Fidro offers a free API plan with 200 lookups per month — no credit card required. Paid plans start at $29/month for 5,000 lookups with full domain intelligence.
Need domain checks at scale?
Add domain reputation checking to your signup flow with one API call. Get disposable detection, MX verification, DNS resolution, and risk scoring in a single request.
curl -X POST https://api.fidro.io/v1/domain-lookup \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{"domain": "example.com"}'Also try our email checker, IP checker, VPN detector, bulk email checker, and browse the disposable emails database.