Mailthentic is a bulk email verification and list cleaning platform. Upload your email list, verify every address through 9 checks, and download clean results — all without sending a single email.
5,000 free verification credits on signup. No credit card required.
| Without Verification | With Verification |
|---|---|
| 8-15% bounce rate on uncleaned lists | Under 1% bounce rate |
| Gmail/Outlook flags your domain | Clean sender reputation |
| Campaigns land in spam folder | Emails reach the inbox |
| Wasted money sending to dead addresses | Every send reaches a real person |
| 2-6 weeks to recover reputation | No recovery needed |
Email addresses decay at 2-5% per month. A list that was clean 6 months ago could have 15-25% bad addresses today.
Upload a CSV or Excel file. Mailthentic auto-detects the email column and removes duplicates before verification starts.
| # | Check | What It Catches |
|---|---|---|
| 1 | Syntax Validation | Typos, malformed addresses (user@@gmail.com) |
| 2 | DNS Record Lookup | Dead domains, parked domains |
| 3 | MX Record Check | Domains with no mail server configured |
| 4 | SPF Verification | Domains with broken sender authorization |
| 5 | DKIM Check | Missing email signing configuration |
| 6 | DMARC Validation | No authentication policy set |
| 7 | SMTP Mailbox Confirmation | Inboxes that don't exist (without sending email) |
| 8 | Disposable Email Detection | Guerrillamail, Tempmail, 10MinuteMail (800+ providers) |
| 9 | Catch-All Detection | Domains that accept everything (dual-probe system) |
Every email is categorized:
| Status | Meaning | What To Do |
|---|---|---|
| Valid | Mailbox exists, safe to send | Keep in your list |
| Invalid | Mailbox doesn't exist, will hard bounce | Remove immediately |
| Risky | Catch-all, role-based, or disposable | Send with caution or suppress |
| Unknown | Server didn't respond conclusively | Retry in 24-48 hours |
Each result includes a confidence score (0-100%) so you can make informed decisions, not just pass/fail.
Total emails verified: 50,000
Valid: 78.3% (39,150) ✅ Safe to send
Invalid: 8.2% ( 4,100) ❌ Would have hard bounced
Disposable: 4.1% ( 2,050) 🗑️ Throwaway addresses
Role-based: 3.7% ( 1,850) 👤 info@, admin@, support@
Catch-all: 2.8% ( 1,400) ⚠️ Can't confirm individual
Unknown: 2.9% ( 1,450) ❓ Server didn't respond
Addresses removed: 10,850 (21.7%)
Bounce rate prevented: 8.2% → under 1%
That 8.2% invalid rate alone would have pushed the bounce rate past the danger threshold. ISPs start flagging you above 2%.
These work instantly, no signup required:
Verify any email address with DNS, MX, SPF, DKIM, DMARC, and disposable detection.
mailthentic.com/tools/email-checker/
Check your domain's email authentication setup. Get a health score (A-F) with specific fix recommendations for SPF, DKIM, and DMARC.
mailthentic.com/tools/domain-checker/
See which mail servers handle email for any domain. Identifies the email provider (Gmail, Outlook, Yahoo, etc.).
mailthentic.com/tools/mx-lookup/
Calculate how much email bounces are costing your business and see the ROI of list verification.
mailthentic.com/tools/bounce-calculator/
| List Size | Estimated Time | Emails/Minute |
|---|---|---|
| 1,000 | 2-5 minutes | ~300/min |
| 10,000 | 15-30 minutes | ~400/min |
| 50,000 | 1-2 hours | ~500/min |
| 100,000+ | 2-4 hours | ~600/min |
Speed depends on target mail servers — some respond instantly, others use greylisting which requires retry delays.
Upload your marketing list before every send. Remove invalid and risky addresses to keep bounce rates under 1%.
Connect HubSpot, Salesforce, or Mailchimp via OAuth. Import contacts, verify every address, and push clean results back to your CRM automatically.
Verify prospect lists before outreach. Protect your sender domain from bounces that damage reputation and reduce inbox placement.
Block disposable emails, catch typos, and verify addresses at the point of capture — before bad data enters your database.
Clean subscriber lists before promotional campaigns. Remove addresses that have gone stale between purchase cycles.
| Feature | Mailthentic | ZeroBounce | NeverBounce | Hunter.io | Clearout |
|---|---|---|---|---|---|
| Verification checks | 9-point | 5-point | 5-point | 3-point | 5-point |
| Catch-all detection | Dual-probe | Single | Single | No | Single |
| Disposable detection | 800+ domains | Yes | Yes | Yes | Yes |
| Free tool (no signup) | Yes | No | No | Limited | No |
| Free credits | 5,000 | 100 | 1,000 | 25/mo | 100 |
| Price per email | $0.001 | $0.008-0.020 | $0.008 | $0.010 | $0.007 |
| CRM integrations | HubSpot, Salesforce, Mailchimp | Multiple | Multiple | Salesforce | Limited |
| Confidence scoring | 0-100% | Pass/fail | Pass/fail | Pass/fail | Pass/fail |
| Domain health check | Yes (free) | No | No | No | No |
| MX lookup tool | Yes (free) | No | No | No | No |
Most verification tools give you "valid" or "invalid" with no explanation. Mailthentic shows you exactly what was checked — every DNS record, every SMTP response, every risk flag — with a confidence score instead of a binary pass/fail.
| Volume | Mailthentic | ZeroBounce | NeverBounce |
|---|---|---|---|
| 5,000 emails | $4.99 | $40.00 | $40.00 |
| 10,000 emails | $9.99 | $80.00 | $80.00 |
| 25,000 emails | $24.99 | $130.00 | $100.00 |
| 50,000 emails | $29.99/mo | $190.00 | $150.00 |
60-75% cheaper at every volume tier.
No subscription. No recurring charges. Credits never expire.
| Pack | Credits | Price | Per Email |
|---|---|---|---|
| Free | 5,000 | $0 | Free |
| Starter | 5,000 | $4.99 | $0.001 |
| Growth | 10,000 | $9.99 | $0.001 |
| Business | 25,000 | $24.99 | $0.001 |
For teams with regular verification needs. Cancel anytime.
| Plan | Verifications/mo | Price | Per Email |
|---|---|---|---|
| Starter | 10,000 | $6.99/mo | $0.0007 |
| Growth | 30,000 | $14.99/mo | $0.0005 |
| Business | 50,000 | $29.99/mo | $0.0006 |
2 months free + bonus credits on all yearly plans.
| Plan | Verifications/mo | Price | Saves | Bonus Credits |
|---|---|---|---|---|
| Starter | 10,000 | $69.90/yr | $13.98 | 5,000 |
| Growth | 30,000 | $149.90/yr | $29.98 | 10,000 |
| Business | 50,000 | $299.90/yr | $59.98 | 25,000 |
Learn how to improve your email deliverability:
- How to Reduce Email Bounce Rate: 10 Proven Methods
- SPF, DKIM & DMARC: Complete Setup Guide
- What Is Email Verification and Why Does It Matter?
- SMTP Response Codes: Complete Reference Guide
- Hard Bounce vs Soft Bounce: What's the Difference?
- Catch-All Emails Explained
- Disposable Email Detection Guide
- Why Your Emails Go to Spam (And How to Fix It)
- Best Email Verification Services of 2026
- Free Email Verification: How to Verify Without Paying
No. Mailthentic connects to mail servers via SMTP to confirm mailboxes exist but never delivers any message. DNS and MX checks are passive lookups.
Thousands of emails per minute with parallel processing. A 10,000 email list typically completes in 15-30 minutes.
A domain configured to accept email for any address — even ones that don't exist. Mailthentic uses dual-probe detection (two random address probes) to identify these, so you know which results to treat with caution.
Temporary addresses from services like Guerrillamail, Tempmail, and 10MinuteMail. Mailthentic detects 800+ disposable email providers and flags them in your results.
Under 2% is acceptable. Under 1% is excellent. Above 5% and ISPs start flagging your domain. Regular bulk verification keeps you well under these thresholds.
Before every major campaign. Email addresses decay at 2-5% per month — a list that was clean 3 months ago could have 10%+ bad addresses.
Yes. Mailthentic handles provider-specific behaviors for 40+ email providers including Google Workspace, Microsoft 365, Yahoo, ProtonMail, Zoho, and self-hosted servers.
CSV and Excel (.xlsx). Mailthentic auto-detects the email column — no special formatting required.
Verify contacts directly in your CRM without CSV exports:
| CRM | Features |
|---|---|
| HubSpot | Import contacts, verify, push clean results back via OAuth |
| Salesforce | Verify leads and contacts, sync verification status |
| Mailchimp | Clean subscriber lists before campaigns |
Different email providers respond differently to verification. Mailthentic applies custom logic for each:
| Provider | Verification Behavior | How Mailthentic Handles It |
|---|---|---|
| Gmail / Google Workspace | Returns 250 for non-existent mailboxes | Flagged as "ambiguous" with adjusted confidence |
| Microsoft 365 / Outlook | Similar ambiguous responses | Provider-specific confidence scoring |
| Yahoo | Aggressive rate limiting | Adaptive throttling with retries |
| ProtonMail | Limited SMTP responses | DNS + pattern-based verification |
| Self-hosted (Postfix/Exim) | Standard SMTP responses | Full 9-point verification |
| Industry | Average Bounce Rate (Uncleaned) | After Verification |
|---|---|---|
| SaaS | 6-10% | Under 1% |
| eCommerce | 5-8% | Under 1% |
| Marketing Agencies | 8-15% | Under 2% |
| Cold Outreach | 10-25% | Under 3% |
| Financial Services | 4-7% | Under 1% |
| Resource | URL |
|---|---|
| Website | mailthentic.com |
| Free Email Checker | mailthentic.com/tools/email-checker/ |
| Free Domain Checker | mailthentic.com/tools/domain-checker/ |
| MX Record Lookup | mailthentic.com/tools/mx-lookup/ |
| Bounce Calculator | mailthentic.com/tools/bounce-calculator/ |
| Pricing | mailthentic.com/pricing/ |
| Blog | mailthentic.com/blog/ |
| Bulk Email Verifier | mailthentic.com/bulk-email-verifier/ |
| linkedin.com/company/mailthentic/ | |
| facebook.com/mailthentic | |
| instagram.com/mailthentic/ |
Get 5,000 Free Verification Credits → Upload your list and see results in minutes. No credit card required.