MailVeri - Free Bulk Email Verifier
Email verification and list cleaning platform that validates addresses via multi-stage SMTP handshakes, real-time REST APIs, and MCP server tools.
About MailVeri - Free Bulk Email Verifier
MailVeri is an email verification and list cleaning platform created to help digital marketers, sales teams, and developers safeguard sender reputation. High email bounce rates trigger spam filters and damage domain deliverability across outbound campaigns. MailVeri addresses this challenge by evaluating email addresses through comprehensive multi-layer validation checks before messages are dispatched.
The platform handles single address checks as well as high-volume bulk list processing. Users can upload spreadsheets in CSV, Excel, or text formats containing up to one million contacts per file. The verification pipeline executes syntax formatting checks, DNS and MX record confirmations, disposable email detection, role account flags, and direct SMTP mailbox handshakes without sending actual emails.
Developers can embed verification directly into registration workflows using a low-latency REST API, preventing bot registrations and typographical errors at the point of entry. In addition, an open-source Model Context Protocol server connects directly to AI tools such as Claude, Cursor, and Windsurf, enabling coding assistants to execute email validation routines within developer environments.
MailVeri uses a pay-as-you-go credit system where purchased credits never expire, eliminating recurring monthly subscription obligations. New accounts receive one thousand free verification credits upon registration without entering billing details. With AES-256 encryption at rest and automated data deletion, the platform provides a secure and budget-friendly utility for marketing deliverability.
Features
- Bulk verification of up to 1,000,000 emails per file
- Real-time email verification via REST API
- Detection of disposable, catch-all, and role-based emails
- Native Model Context Protocol server enabling AI assistants in Claude, Cursor, and Windsurf to verify email lists
- Automatic 30-day privacy retention policy that purges uploaded lists and validation results from cloud storage
Use cases
- Marketing teams cleaning outbound mailing lists to reduce bounce rates
- Developers verifying email signups in real time during user registration
- Agencies validating client contact lists before email campaigns
- Connecting AI coding assistants like Claude or Cursor via MCP to verify contact data directly inside agent workflows
- Identifying risky catch-all mailboxes and spam traps prior to launching commercial sales sequences
Screenshots
Frequently asked questions
What file types can I upload for verification?
MailVeri supports CSV, Excel (.xlsx, .xls), and plain text (.txt) files up to 100MB and can handle up to 1,000,000 email addresses per list.
Does MailVeri send emails during verification?
No, the verification process checks mailbox existence without sending any emails, ensuring zero impact on your sender reputation.
Do you offer free credits to start with?
Yes, after registering and confirming your email, you receive up to 1,000 free credits. Credits never expire.
What free diagnostic utilities are available on the platform?
MailVeri provides free standalone deliverability tools including MX record lookups, domain reputation checks, and DNSBL blacklist monitors.
Can users delete verification records before the automated thirty-day purge?
Yes. Users can manually delete uploaded lists, verification reports, and associated data at any time directly from the account dashboard.
What we verified
- Public API
- Yes (REST API provided for real-time verification and bulk list automation)
- Self-hostable
- No (Hosted cloud platform)
- Free tier without a credit card
- Yes (1,000 free verification credits provided upon sign-up without payment details)
- Pricing model
- Pay-as-you-go credit packs (No recurring subscriptions; credits never expire)
- Price
- Free tier with 1,000 credits; paid packs start at $9 for 10,000 credits, $19 for 25,000 credits, $59 for 100,000 credits, up to $999 for 5,000,000 credits
- Data region / hosting location
- Not stated (Cloud infrastructure with AES-256 encryption at rest and GDPR compliance support)
- Named integrations
- REST API, Model Context Protocol (MCP), Claude, Cursor, Windsurf
Could not be verified
- Specific cloud datacenter hosting provider and physical server geographic locations
- Direct native integration plugins for marketing CRMs like HubSpot, Mailchimp, or Klaviyo
- Concurrency limits or per-second rate limits applied to bulk API endpoints
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