MailboxValidator is unclaimed —

MailboxValidator

Secure and reliable email validation service to check for invalid email addresses.·mailboxvalidator.com

MailboxValidator is an email validation and verification service that connects to mail servers to check whether a mailbox actually exists, helping reduce email bounce rates and improve sender reputation. It offers a bulk email list cleaner for uploading CSV or TXT files and a real-time REST API for validating single email addresses at signup or checkout. The service checks email syntax, MX records, SMTP connectivity, disposable and role-based addresses, greylisting, SPF/DMARC records, and duplicate entries.

What it's for

Clean email marketing lists to reduce bounce rateValidate single email addresses in real time at signup or checkoutBulk validate large mailing lists via CSV/TXT uploadDetect disposable, role-based, or suppressed email addressesRemove duplicate emails from a listCheck MX records and mail server connectivityVerify SPF and DMARC authentication records

Features 18

Automated notification email upon bulk completion
Bulk Validation (CSV/TXT upload)
Disposable Email Provider Checker
DMARC Enforced Checker
Downloadable CSV report of bulk results
Duplicate Email Remover
Email Greylisting Checker
Email Syntax Checker
Free Email Provider Checker
JSON and XML API response formats
MX Record Checker
MX Server Connection Checker
Real-time REST API for single email validation
Role Email Checker
Single Validation via web dashboard
Strict SPF Checker
Suppressed Email Checker
Website Exists Checker

At a glance

free tierfree trialAPI

TypeWeb app

DeploymentCloud

PlatformsWeb

ForEmail Marketers, Merchants, Developers, System Integrators

CompanyMailboxValidator.com

Integrations

MailChimpSendGridAweberMailGunActiveCampaignZapierWordPress

Pricing

Bulk plans are one-time credit purchases with no setup fees or monthly subscription, valid for 30 days; API plans are monthly subscriptions with auto-renewal and auto-recharge. Yahoo email validation is not supported.

BULK-TRIALFree

Free bulk trial; standard support response under 1 hour.

100 queries, 30-day validity

BULK-1Quote

One-time purchase, no monthly subscription; email support response under 4 hours.

1,000 queries, 30-day validity

BULK-5Quote

One-time purchase, no monthly subscription; email support response under 4 hours.

5,000 queries, 30-day validity

BULK-10Quote

One-time purchase, no monthly subscription; email support response under 4 hours.

10,000 queries, 30-day validity

BULK-50Quote

One-time purchase, no monthly subscription; email support response under 12 hours.

50,000 queries, 30-day validity

BULK-100Quote

Marked as most popular bulk plan. One-time purchase; email support response under 24 hours.

100,000 queries, 30-day validity

BULK-500Quote

One-time purchase, no monthly subscription; email support response under 48 hours.

500,000 queries, 30-day validity

BULK-1000Quote

One-time purchase, no monthly subscription; email support response under 72 hours.

1,000,000 queries, 30-day validity

API-FREEFree

Auto renewal and auto recharge; standard support.

300 queries per month, 30-day validity

API-FREE+Free

By invitation only; requires an invite code. Auto renewal and auto recharge; standard support.

600 queries per month, 30-day validity

API-3$29.95/mo

Auto renewal and auto recharge; email support.

3,000 queries per month, 30-day validity

API-15$69.95/mo

Marked as most popular API plan. Auto renewal and auto recharge; email support.

15,000 queries per month, 30-day validity

API-75$139.95/mo

Auto renewal and auto recharge; email support.

75,000 queries per month, 30-day validity

API-375$339.95/mo

Auto renewal and auto recharge; email support.

375,000 queries per month, 30-day validity