No. 33 of 36 ·Email Verification Services

MailboxValidator

Web · API

Freedom report

One barScore 4.8

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedThinly documented

MailboxValidator is ranked #33 of 36 in email verification services on Freedom251. It runs on API, Web. There is a free plan. A free trial is offered.

MailboxValidator plans and pricing

All plans

API-FREE Free Per Month 300 Queries · Auto Renewal · Auto Recharge · Standard Support · 30-Day Validity mailboxvalidator.com · 9 Oct 2026

BULK-TRIAL Free 100 Queries · Standard Support · < 1 hour · 30-Day Validity mailboxvalidator.com · 9 Oct 2026

API-FREE+ Free Per Month 600 Queries · Auto Renewal · Auto Recharge · Standard Support · 30-Day Validity · By invitation only mailboxvalidator.com · 9 Oct 2026

BULK-1 $19.95 once 1,000 Queries · Email Support · < 4 hours · $0.02 / Query · 30-Day Validity mailboxvalidator.com · 9 Oct 2026

BULK-5 $39.95 once 5,000 Queries · Email Support · < 4 hours · $0.008 / Query · 30-Day Validity mailboxvalidator.com · 9 Oct 2026

BULK-10 $59.95 once 10,000 Queries · Email Support · < 4 hours · $0.006 / Query · 30-Day Validity mailboxvalidator.com · 9 Oct 2026

Compared on email verification services

Free plan: No
Disposable detection: Yes

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The record

Purpose: MailboxValidator checks email addresses and mailboxes to identify invalid addresses and help reduce email bounces.
Bulk validation: Users can upload an email list in text or CSV format for bulk validation.
API results: The single email validation API returns results in JSON or XML.
Validation checks: Checks include syntax, MX records, SMTP response, greylisting, disposable addresses, free providers, role addresses, suppression, DMARC, strict SPF, and website reachability.
Supported developers: The API documentation links SDK modules or libraries for Node.js, Ruby, PHP, Perl, Python, Java, .NET, Go, and Rust.
Yahoo limitation: The service states that it does not support Yahoo email validations at this time.
ASCII limitation: The FAQ says only purely ASCII email addresses are validated; non-ASCII characters are marked as invalid syntax.
Refunds: The FAQ states that the service does not offer refunds.
Validation method: The company says it does not send an email to the recipient during checking and instead tests the connection using the SMTP server.
Privacy and retention: The privacy policy says personal data processed through the service is retained indefinitely, though a deletion request may be submitted subject to the policy's limitations.
Security: Hexasoft says it maintains technical, administrative, and physical measures reasonably designed to help protect personal data from unauthorized processing.
Support: The privacy policy lists [email protected] and says to allow up to four weeks for a reply to privacy inquiries.
Headquarters: Penang, Malaysia
Price from: Free

Where it ranks on Freedom251

Best Email Verification Services in 2026#33 of 36

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Sources

mailboxvalidator.com· checked 9 Oct 2026
mailboxvalidator.com/api-single-validation· checked 9 Oct 2026
mailboxvalidator.com/plans· checked 9 Oct 2026
mailboxvalidator.com/faqs· checked 9 Oct 2026
mailboxvalidator.com/privacy-policy· checked 9 Oct 2026