Verify Email Lists in Minutes
Ensure Inbox Delivery
The Waltertonis email verification software helps you clean contact lists, reduce bounce rates, and improve campaign deliverability. Our verification engine checks emails against live mail servers in real-time — no data storage, complete privacy, no hidden fees.
Why Email List Verification Matters
Invalid emails waste your marketing budget, harm sender reputation, and lower open rates. Waltertonis verifies every address against active mail servers so your campaigns reach real inboxes — not spam folders or dead ends.
Upload your contact list. We verify it. You download the clean results — all in your browser, all under your control.
Complete verification included. No tier upgrades. No feature paywall.
What Gets Checked
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✓Email Syntax & Format
Catches typos and malformed addresses.
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✓Domain Validation
Confirms domains are registered and active.
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✓Mailbox Status
Verifies the inbox actually exists via a live server check.
What's Included in Every Package
All diagnostic engines listed below are included natively. No tiered paywalls, no feature gating. Your standard package credits grant full access to the entire verification array.
Email Format Checking
RFC compliance validation and typo detection.
- ■RFC syntax compliance checks
- ■Typo and whitespace normalization
- ■Automatic duplicate removal
Domain & DNS Verification
Confirms domain registration and active mail servers.
- ■Verify domain registration exists
- ■Check for valid MX records
- ■Identify parked or inactive domains
Live SMTP Handshake
Direct server connection to verify inbox deliverability.
- ■Connect directly to receiving server
- ■Simulate message delivery handshake
- ■Confirm specific user inbox exists
Risk Flagging
Identifies temporary or disposable domains, role-based accounts, and catch-all servers.
- ■Flag disposable temporary domains
- ■Identify role-based accounts (info@)
- ■Detect catch-all server configurations
Browser-Based Workspace
Process lists without storing data on our servers.
- ■Live row-by-row status updates
- ■Plain-English outcome explanations
- ■One-click CSV list export
Credit Tracking
See exactly how many verifications you have used in real time.
- ■Credits valid for 30 days
- ■No recurring subscriptions
- ■Real-time balance visibility
How the Verification Process Works
Every record advances through a structured, predictable analysis sequence inside the verification engine. Track your data from raw input to clean export.
Upload Your List
Paste or upload your contact emails into our secure workspace. Duplicates and blanks are removed automatically.
Syntax & Domain Check
Emails are validated against standard formats and verified against live DNS records to confirm domains are active.
Live Server Verification
We connect directly to mail servers and simulate message delivery to confirm each inbox exists and can receive mail.
Download Your Results
Get a clean, verified list with status codes ready to import into your CRM.
Credit Packages
Purchased credits expire 30 days after payment. Free credits are used first, then the paid credits that expire soonest.
Prices exclude tax. Applicable tax is added at checkout.
Platform Details
Frequently Asked Questions
How do I download my verified email list?
After verification completes, download your clean contact list as a CSV file that opens directly in Excel, or as JSON. Import it directly into your CRM, email platform, or sales tool.
What email checks does Waltertonis perform?
We check email format and syntax for errors, verify the domain is registered and has active mail servers, connect to the mail server to confirm the inbox exists, and flag risky addresses like temporary emails and role-based accounts.
Do invalid emails use up my credits?
Yes. Every email address checked uses one credit, whether it returns as valid, invalid, or risky. This covers the cost of live server checks we perform on each address.