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✓ Syntax · Disposable · Role-based · Free vs Business · Bulk Mode

Email Validator

Free email validator online — verify email address syntax, detect disposable and role-based addresses, identify free providers, and bulk validate up to 50 emails at once. 100% client-side, zero data transmitted.

✓ RFC 5321 syntax✓ 200+ disposable providers✓ 80+ free providers✓ Role detection✓ Quality score✓ Bulk up to 50
Validate email address
What this tool checks

Free email validator — verify email addresses for syntax, deliverability, and quality

Email validation is the process of checking whether an email address is syntactically correct, from a legitimate non-disposable provider, and suitable for the context you intend to use it in. This tool runs four checks that cover the most common sources of invalid, low-quality, or risky addresses on a contact list.

For marketing teams, validating a list before a campaign directly reduces hard bounce rates — the key metric that ESPs like Mailchimp, HubSpot, and SendGrid use to evaluate sender reputation. Accounts with bounce rates above 2–5% are flagged or suspended. For sales teams and CRM imports, filtering out disposable and role addresses ensures outreach goes to real individuals rather than shared inboxes or expired throwaway accounts.

What this tool does
RFC 5321 Syntax
Validates format: characters, @ placement, domain structure, TLD validity, length limits (64-char local, 254 total). An address failing syntax will never deliver.
Disposable Detection
Matches against 200+ known throwaway services (Mailinator, Guerrilla Mail, YOPmail, etc.). Disposable addresses expire automatically and have zero engagement value.
Role-Based Detection
Identifies shared inbox prefixes: info, admin, support, sales, billing, hr, noreply, and 55 more. Role addresses have low open rates and can trigger spam complaints.
Free vs Business
Flags Gmail, Yahoo, Hotmail, iCloud, and 80+ consumer providers. A business domain address indicates professional context — important for B2B lead quality.
Quality Score 0–100
A single number summarising all four checks. 100 = valid business email. 85 = free provider. 60 = role-based. 20 = disposable. 0 = invalid syntax.
Bulk Mode
Paste up to 50 addresses separated by newlines, commas, or semicolons. All validated simultaneously with per-address verdict and a summary counts bar.
Quality score guide
100Valid BusinessClean syntax, business domain, personal address
85Free ProviderValid syntax, Gmail / Yahoo / Outlook domain
60Role-Basedinfo@, admin@, support@ — shared inbox
0–20Invalid / TempSyntax error or disposable provider
Examples

Validation examples -- how different address types are classified

These examples show the range of email types the validator handles and what verdict each receives.

ValidCorporate address -- all checks pass
Address: jane.smith@acme.com Syntax: Valid (RFC 5321) Domain: acme.com -- MX records found Provider: Business / Corporate Verdict: Valid -- safe to send

A corporate address that passes all checks is the highest quality result. Valid syntax, a domain with active MX records, and a non-free-provider classification indicate a real business email. These addresses typically have the lowest bounce rates and highest engagement in outbound campaigns.

ValidGmail address -- valid free provider
Address: user@gmail.com Syntax: Valid (RFC 5321) Domain: gmail.com -- MX records found Provider: Free (Google) Verdict: Valid -- consumer email address

Gmail and other major free providers have robust MX infrastructure so the address is fully deliverable. The free provider classification is informational and is not a reason to reject the address. It may be relevant for B2B use cases where business addresses are preferred over consumer webmail.

InvalidDisposable address -- temporary inbox, blocked
Address: user@mailinator.com Syntax: Valid Domain: mailinator.com -- MX records found Provider: Disposable Verdict: Invalid -- disposable/temporary domain

The syntax is valid and MX records exist but the domain is a known disposable provider. These addresses should be rejected at registration because they indicate the user does not want ongoing contact. Any email sent to mailinator inboxes is publicly readable and provides no engagement value.

InvalidNo MX records -- domain cannot receive email
Address: user@parked-domain.com Syntax: Valid Domain: parked-domain.com -- NO MX records Provider: Unknown Verdict: Invalid -- undeliverable domain

The address is syntactically correct but the domain has no MX records, meaning no mail server is configured to receive email for it. Any message sent to this address will immediately hard-bounce. Parked domains, redirect-only domains, and recently expired domains commonly produce this result.

InvalidSyntax error -- malformed address
Address: not-an-email@ Syntax: Invalid -- missing domain Domain: N/A Verdict: Invalid -- syntax check failed

Syntax validation is the first check and fastest to fail. This address is missing its domain entirely. Common syntax errors include missing @, missing domain, spaces within the address, and invalid characters. Syntax failures are caught instantly without any DNS lookup.

FAQ

Frequently asked questions about email validation and verification

What does this email validator check?
The validator runs four checks: (1) syntax validation against RFC 5321 — checking format, character legality, label lengths, and TLD validity; (2) disposable provider detection against a list of 200+ known throwaway services; (3) role-based address detection for shared inboxes like info@, admin@, support@; and (4) free vs business provider classification using a list of 80+ consumer email domains. The validator combines syntax checking, DNS verification, and provider classification into a single check that runs in under two seconds per address.
What is a disposable email address?
Disposable email addresses are temporary inboxes from services like Mailinator, Guerrilla Mail, or 10-Minute Mail, designed to receive a single email and then be discarded. Users provide them to avoid registering with their real address. They have zero long-term engagement value — if someone signs up with a disposable address they are not a genuine lead and the address will be dead within hours.
What is a role-based email address and why does it matter?
Role addresses are shared mailboxes not tied to a specific person — info@, admin@, support@, sales@, billing@, etc. They're typically read by multiple people, have low open rates, generate more spam complaints, and frequently result in CAN-SPAM and GDPR compliance issues because you can't confirm who the individual recipient is. Most email marketing platforms recommend excluding role addresses from campaigns.
What is the quality score?
The quality score runs from 0 to 100. A valid business email with clean syntax and a non-free domain scores 100. Free provider emails (Gmail, Yahoo, etc.) score 85. Role-based addresses score 60. Disposable addresses score 20. Invalid syntax scores 0. The score is a quick signal for how suitable an address is for marketing, sales outreach, or CRM import.
Does this confirm an email address actually exists?
No — this tool performs static validation (syntax and provider checks). Confirming that a specific mailbox actually exists requires an SMTP connection to the mail server, which can only be done server-side. A passing result here means the email is syntactically valid and from a legitimate, non-disposable provider — which is a strong indicator, but not a guarantee. For high-stakes use cases, combine this with live SMTP verification.
How does bulk email validation work?
Switch to Bulk mode and paste up to 50 email addresses, one per line or comma/semicolon separated. All 50 are validated simultaneously in your browser using the same four checks. The results show each address with its verdict and a colour-coded status. A summary of pass/fail counts is shown at the top. You can copy the list of valid emails to your clipboard.
Can I use this for cleaning email marketing lists?
Yes — this is one of the primary use cases. Before importing a list into a CRM or sending a campaign, run it through bulk validation to remove invalid addresses (which cause hard bounces), disposable addresses (dead leads), and optionally role addresses (low engagement). Keeping bounce rates below 2% is essential for maintaining sender reputation with ESP providers like Mailchimp, SendGrid, and HubSpot.
Why does it flag Gmail addresses as 'free'?
Gmail, Yahoo, Hotmail, and similar domains are consumer email providers — they're free to sign up for and carry no information about the person's employer or business context. This is useful to know for B2B sales prospecting, where a business domain address is a stronger indicator that the person works at a company. The 'free' verdict is informational — it doesn't mean the address is invalid or unusable.
Are email addresses stored or logged?
No — all validation runs entirely in your browser using JavaScript. No email addresses, no validation results, and no usage data are transmitted to any server, stored in any database, or logged in any way. You can safely validate lists of customer or prospect emails. All validation logic runs locally in your browser -- email addresses you enter are never transmitted to any third-party validation service or stored on a server.
What is email bounce rate and why should I care?
Your email bounce rate is the percentage of emails in a campaign that could not be delivered. Hard bounces (permanent delivery failures, usually from invalid addresses) are the most damaging — ESPs like Mailchimp and SendGrid will suspend accounts with bounce rates above 2–5%. Validating your list before sending is the most effective way to keep bounce rates low and protect your sender reputation.
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